All Honkai: Star Rail Web Event, Offline Event and Version Preview Pages (past and present)
Here's a summary of all the web events, offline events and version preview pages in Honkai: Star Rail so far! I will be updating this regularly as more events and preview pages are added. This is so that you can revisit them if you want to see what the events looked like. 
p.s. !!! I have a similar list for Genshin Impact here. 
You can also access Part 2 of the HSR list below:
Without further ado, here is the list:
"Interstellar Warp" Web Event
Access the web event here.
"Pom-Pom's Galaxy Travel Guide" Web Event
Access the web event here.
"Pom-Pom's Quiz With Rewards" Web Event
Access the web event here.
"All-Stars Invite" Web Event
Access the web event here.
Version 1.0 "The Rail Unto the Stars"
More info here.
Version 1.1 "Galactic Roaming" Highlights Page
Access the highlights page here.
"The Way of the Stomach" Web Event
Access the web event here.
"Mimo's Trailblaze Guide" Web Event
Access the web event here.
Version 1.2 "Even Immortality Ends" Highlights Page
Access the highlights page here.
Honkai: Star Rail "Global Tea Event - Cosmic Refreshment Supply" Offline Event
Learn more about the offline event here.
"Xianzhou Cruise" Web Event
Access the web event here.
HoYo FEST 2023
Access the web event here.
"Code ACTION" Web Event
Access the web event here.
Version 1.3 "Celestial Eyes Above Mortal Ruins" Highlights Page
Access the highlights page here.
Version 1.4 "Jolted Awake From a Winter Dream" Highlights Page
Access the highlights page here.
"Galactic Delicacies" Guide Event (collab with Kith Café)
Access the event page here.
"Simulated Market" Web Event
Access the web event here.
Version 1.5 "The Crepuscule Zone" Highlights Page
Access the highlights page here.
"Come With Me, Take the Journey" Web Event
Access the web event here.
"2023 Star Rail World Tour" Offline Event
Access the web page here.
Version 1.6 "Crown of the Mundane and Divine" Highlights Page
Access the highlights page here.
"In Roses' Name" Web Event
Access the web event here.
HoYoFair New Year 2024
Access the event page here.
Click here to enter the Honkai: Star Rail Zone.
"Fable of the Stars" Web Event
Access the web event here.
Version 2.0 "If One Dreams At Midnight" Highlights Page
Access the highlights page here.
"Reservation with Rewards | Welcome to The Reverie Hotel" Web Event
Access the web event here.
"Dive Into Dreamwoven Wonders" Global Serial Event
More info here.
"Festival Invitation" Returning Web Event
Access the web event here.
Penacony Night of Carousal Events Summary Page
More info here.
Honkai: Star Rail x Opera GX Event
More info here.
Access the event page here.
[OFFLINE EVENT] Honkai: Star Rail x Sprinkles Collab
More info here.
[OFFLINE EVENT] Honkai: Star Rail x BAIT Collab
More info here.
#HSRValentines2024 Facebook Event
More info here.
Access the event here.
The Lordly Trash Can is Invading Offline Event [various locations]
More info here.
Singapore event here.
The Honkai: Star Rail Version 2.1 "Into the Yawning Chasm" Special Program Event with Rewards
More info here.
Version 2.1 "Into the Yawning Chasm" Highlights Page
Access the highlights page here.
Honkai: Star Rail World Tour 2024 Exhibition
More info here.
Access the event page here.
Honkai: Star Rail Concert Global Livestream (2024 Star Rail Live - The Stars Song for You)
Honkai: Star Rail 2024 Annual Creator Competition "Multiverse Vistas" (Kicking off on April 3)
Latest update here.
Access the event website here.
#DiveIntoDreams 3D Render Challenge (commencing on April 3)
Access the event website here.
Honkai: Star Rail 1st Anniversary Celebration (online AND offline events)
Access the event page here.
Honkai: Star Rail's Anniversary Party - One Night in Penacony Offline Event
More infohere.
Penacony Carnivalesque Dream Offline Event (SG)
"Come With Me, Take the Journey" Web Event
Access the web event here.
"Peaches for Miss Acheron" Facebook Messenger Event
Access the event here.
Honkai: Star Rail's One-Year Anniversary Celebration "A Chapter of Stars and Dreams" Event
More info here.
Access the event here.
"Penacony Panorama" HoYoFair Web Event
More info here.
Access the event here.
"S.P.A.R.K.L.E ~Sandman Peeps As Rhythm Keeps LIVE EVENT~ Jazz Night"
Access the stream link here.
Access the event page here.
"Aventurine's Game of Chance" Social Media Event
More info here.
"Aventurine's Challenge Invitation" Social Media Event
More info here.
"Astral Express Annual Trailblaze Report" Web Event
Access the web event here.
Version 2.2 "Then Wake to Weep" Highlights Page
Access the highlights page here.
#TheRobinILike Social Media Event
More info here.
Receive the small gift from Robin here.
"Before The Next Song Begins" Web Event
Access the web event here.
Honkai: Star Rail Version 2.2 Discord Quest Stream Event
"My Robin Playlist" Social Media Event
More info here.
Events with Rewards: "Welcome to Moonless Midnight: Robin's Rhythmic Festival"!
More info here.
Honkai: Star Rail Version 2.2 "Then Wake to Weep" Reddit Event
Access the event here.
"Smoking Cool — The Universe! Pew! Pew! Grand Challenge! Web Event
Access the web event here.
Version 2.3 "Farewell, Penacony" Highlights Page
Access the highlights page here.
Honkai: Star Rail x Life4Cuts! Offline Collab Event *(US & Canada only)
More info here.
"Come With Me, Take the Journey" Player Return Web Event
Access the web event here.
Honkai: Star Rail "Re-ignite the Divergent Universe" Web Event
Access the web event here.
#MidsummerFireflyTime Facebook Event
More info here.
Access the FB event here.
Honkai: Star Rail x LiHO TEA Singapore Offline Collab
More info here.
Honkai: Star Rail V2.3 Creator Incentive Program "Farewell, Penacony" Online Event
More info here.
Access the event page here.
"Lady Bonajade Handbook" Web Event
Access the web event here.
Gamescom 2024 (Offline Event)
More info here.
Honkai: Star Rail × Fate_UBW Collab (scheduled for 2025)
More info here.
Honkai: Star Rail World Tour 2024 (offline & online)
More info here.
"I Dream of Dreamscape" Web Event
Access the web event here.
HSR AR Trailblazing Heir event in Paris
More info here.
Version 2.4 "Finest Duel Under the Pristine Blue" Highlights Page
Access the highlights page here.
"HoYo FEST 2024" Online and Offline Event
Access the HoYo FEST 2024 Official Web Pagehere.
Version 2.5 "Flying Aureus Shot to Lupine Rue" Highlights Page
Access the highlights page here.
Honkai: Star Rail x Gong Yuan Mala Tang Offline Collab Event (SG)
More info here.
"The General's Levy" Web Event
Access the web event here.
"Come With Me, Take the Journey" Player Return Web Event
Access the web event here.
Astral Market Offline Event at ANIME Impulse Bay Area, San Francisco (12 Oct & 13 Oct 2024)
More info here.
Version 2.6 "Annals of Pinecany's Mappou Age" Highlights Page
Access the highlights page here.
Honkai: Star Rail Simulated Universe 'Unknowable Domain' Highlights Page
Access the highlights page here.
Honkai: Star Rail's Dazzling Ninja Hero AKA Rappa's brand-new trailer single, 'No Dazzle, No Break' [launching on 22/10/2024] - vocals provided by Reol
More info here.
Pre-register here.
Listen here.
Honkai: Star Rail × Playkeyboard Collab: Rappa Keyboard Theme
More info here.
Download the keyboard theme here.
Honkai: Star Rail X BAIT Apparel Collab
More info here.
Visit the online store here.
Useful Links to my other content:
Genshin Impact 
Genshin Overall Folder here! 
Other Quick Links:
- Download all the Genshin Impact Emotes/Stickers in PNG format here.
- List of all Genshin Web, Offline & Version events here.
- [WIP] All Genshin Impact Character Skins here.
- [WIP] All Character Birthday Art here.
- Download the Background Wallpaper from the "Cat's Tail Gathering S2 Tournament 2024" TCG Event here.
- Download the Genshin Impact Feb 2024 Calendar Display Wallpaper here.
- Download all Background Wallpapers from the "Adeptus Mechanical Marvel" Web Event here.
- Download the Genshin Impact "Lean, Mean, Cleaning Machine!" Web Event Wallpapers Showcase here.
- Download the official wallpaper from the V4.4 Preview Page "Vibrant Harriers Aloft in Spring Breeze" here.
- Download all Background Wallpapers from the "Starlit Letter" Web Event here.
- Download the Background Wallpaper from the "Melusines' Survey" Web Event here.
- Download all Wallpapers from the Genshin Impact x TOKYO SKYTREE Collab here.
- Download the in-game HD Wallpaper / Group Photo from the Genshin Impact "Roses and Muskets" Event here (for Lumine) and here (for Aether).
- Download the Official Wallpaper from the Genshin Impact New Year's Day 2024 post here.
- Download the Official Wallpaper from the "Paimon-sea-you-2024" Discord Event here.
- Download all New Year's Blessings from the "Genshin Impact Lottery Event" here.
- Download all wallpapers from the "Roses and Muskets" serieshere.
- Download the Official Wallpaper from the "HoYoFair New Year 2024" Web Page here.
- Download the Official Wallpaper from the "Ancient Treasures Unearthed" Web Event here.
- Download Official Wallpapers from the "GENSHIN CONCERT 2023: Melodies of an Endless Journey (online)" Event here.
- Download all Background Wallpapers from the "Macaron Melange" Web Event here.
- Download the official wallpaper from the V4.3 Preview Page "Roses and Muskets" here.
- Download the official wallpaper from the Genshin Impact V4.3 Livestream here.
- Download all wallpapers from the "Masquerade of the Guilty" serieshere.
- Download all Background Wallpapers from the "VIP Ace Detective" Web Event here.
- Download all Character GIFs from the "Glad Tidings From Afar" Web Event here.
- Download all Background Wallpapers from the "Glad Tidings From Afar" Web Event here.
- Download all wallpapers from the "To the Stars Shining in the Depths" serieshere.
- Download all the Genshin Impact "3rd Anniversary Letter" Wallpapers here.
- Download the Official Wallpaper from "Cogs in the Machine" Web Eventhere.
- Download all wallpapers from the Genshin Impact "Dream of Roving Stars" Web Event Wallpapers Showcase: Set 3 here.
- Download all wallpapers from the Genshin Impact "Dream of Roving Stars" Web Event Wallpapers Showcase: Set 2 here.
- Download all wallpapers from the Genshin Impact "Dream of Roving Stars" Web Event Wallpapers Showcase: Set 1here.
- Download all Background Wallpapers from the "Collective Adornment" Web Event here.
- Download the Official Wallpaper from "Suddenly the Rain Stops" Web Eventhere.
- Download the Genshin V4.1 Preview Page Official Wallpaperhere.
- Download the Genshin Impact Official V4.1 wallpaper here.
- Download all wallpapers from the "As Light Rain Falls Without Reason" serieshere.
- Download the Official Background from "Backstage Encounter" Web Event here.
- Download the official wallpaper from the "Call for Fontaine Adventurers" Web Eventhere.
- Download all wallpapers from the Genshin Impact "Shadows in Motion" Web Event Wallpapers Showcase here.
- Download all wallpapers from the Genshin Impact "Conch Reminiscences" Web Event Wallpapers Showcase here.
- Download all wallpapers from the "Secret Summer Paradise" serieshere.
- Download all wallpapers from the "Duel! The Summoners' Summit!" series here.
- Download all wallpapers from the "A Parade of Providence" series here.
- Download all wallpapers from the "Glittering Elixirs" Web Event here.
- Download the Background Wallpaper from the "Herbal Remedies" Web Event here.
- Download all wallpapers from the "Windblume's Breath" serieshere.
- Download the Background Wallpaper from the "Scarlet Sand Sojourn" Web Event here.
- Download all wallpapers from the "The Exquisite Night Chimes" series here.
- Download all Firework Cards from "Starlit Sky" — Genshin Impact's Firework Card Collecting and Trading Web Event here.
- Download all web event calendar wallpapers from the Genshin Impact "Iridescence in Papers" Web Event here.
- Download all web event wallpapers from the Genshin Impact "Iridescence in Papers" Web Event here.
- Download all wallpapers from the Genshin Impact "The Six Faces of Wisdom" Web Event here.
- Download all wallpapers from the Genshin Impact "Paimon's Starlight Expedition" Web Event here.
- Download all wallpapers from the "All Senses Clear, All Existence Void" series here.
- Download all Genshin Impact TCG Cards (Character, Action & Monster cards)here.
- Download all wallpapers from the Genshin Impact "Tales of the Youkai" Web Event here.
- Download all wallpapers from the Genshin Impact "Carefree Dreamland" Web Event here.
- Download all wallpapers from the "Akasha Pulses, the Kalpa Flame Rises" series here.
- Download all wallpapers from the Genshin Impact "Canvas of Starlight Memories" Web Event here.
- Download all wallpapers from Genshin Impact's 2nd Anniversary and "King Deshret and the Three Magi" here.
- Download Genshin Impact Wallpaper of the 4 Archons here.
- Download all "Dance of Gratitude" web event wallpapers here.
- Download all Verdant Memories wallpapers from "A Walk Through the Woods" web event here.
- Download the V3.1 wallpaper here.
- Download all Genshin Impact HoYo FEST 2022 Wallpapers here.
- Download all Genshin Impact HoYo Quiz 2 Lisa & Albedo Wallpapers here.
- Download all Background Wallpapers from the "Paimon's Gastronomical Journey" Web Event here.
- Download all wallpapers from "The Morn a Thousand Roses Brings" series here.
- Download all 13 Encounter Records wallpapers from "A Journey Through Pages" web event here.
- Download all of The Shimmering Voyage Vol. 2" Wallpapers (x4) here.
- Download all the HoYoLAB First Anniversary Event-Exclusive Emojis here.
- Download all Summer Fantasia wallpapers here.
- Download All Inspirational Paintings from "Journey With a Gentle Breeze" web event here.
- View my beginner's guide on how to farm primos/fates that don't require $$$ here.
- All Lantern Rite Festival 2022 Wallpapershere.
- All images from the Mysterious Voyage web event (Nautical Manual) here.
- Photo Archive of All food dishes from the "Yummy! Barbecue Under the Stars" web eventhere.
- All Genshin Impact tools here.
- Genshin 5* Characters Splash Art here.
- Ayaka fanmade video here.
- Yoimiya fanmade video here.
Honkai: Star Rail 
HSR Overall Folder here! 
Other Quick Links:
- Download all the Honkai: Star Rail Emotes/Stickers in PNG format here.
- List of all Honkai: Star Rail Web, Offline & Version events here.
- [WIP] Download all BGM here.
- [FOR DOWNLOAD/WIP] Ruan Mei Simulated Universe Occurrence Wallpapers here.
- Download the Official Wallpaper from Honkai: Star Rail Version 2.0 here.
- Download all fan art wallpapers from "The Crepuscule Zone" We Need Your Fan Art for Argenti & Hanya contest here.
- Download all 14 Revelation Cards from the "Fable of the Stars" Web Event here.
- Download the HD Wallpaper from the "Fable of the Stars" Web Event here.
- Download the Official Wallpaper from the Honkai: Star Rail Happy New Year 2024 post here.
- Download the Official Wallpaper from the Honkai: Star Rail Version 1.6 "Crown of the Mundane and Divine" Highlights Page here.
- Download all Official Wallpapers from the Honkai: Star Rail "Code: ACTION" Web Event here.
- Download the Honkai: Star Rail wallpaper of Xueyi & Hanya here.
- Download the Official Honkai: Star Rail 2023 TGA Announcement-Penacony Wallpaper here.
- Download the Official Honkai: Star Rail Wallpaper from HoYoverse's Game Awards Win celebratory post here.
- Download Official Wallpapers from the Honkai: Star Rail Version 1.5 The Crepuscule Zone Highlights Page here.
- Download all "High-Cloud Quintet" themed PC wallpapers here.
- Download all wallpapers from "Celestial Eyes Above Mortal Ruins" Highlights Page here.
- Download the official Tingyun wallpaper from the Pom-Pom's Quiz With Rewards Web Event here.
- Download Female Trailblazer image from the "Interstellar Warp" Web Event here.
- Download all Honkai: Star Rail Wallpapers from Pom-Pom's Galaxy Travel Guide Web Event here.
- Download all wallpapers from "The Way of the Stomach" Web Event here.
- Download all wallpapers from the "Simulated Market" Web Event here.
- Download all Honkai: Star Rail HoyoLAB Background Wallpapers here.
- Download Himeko & Bronya backgrounds here.
- Download all Background Wallpapers from Honkai: Star Rail's Final CBT Website here.
- Download all the Pom-Pom Gallery - Light Cones Wallpapers Edition 1 here.
- Download all the Pom-Pom Gallery - Light Cones Wallpapers Edition 2 here.
- Download all the Pom-Pom Gallery - Light Cones Wallpapers Edition 3here.
- Download all the Pom-Pom Gallery - Light Cones Wallpapers Edition 4 here.
- Download all the Pom-Pom Gallery - Light Cones Wallpapers (Feb 2023 Edition) here.
- Download all the Pom-Pom Gallery - Character Wallpapers Edition 1 here.
- Download all the Pom-Pom Gallery - Phone Case Edition 1 here.
- Download all the Pom-Pom Gallery - Phone Case Edition 2 here.
- Download all the Pom-Pom Gallery - Phone Case Edition 3 here.
- Download the Character Phone Case Exhibition — The Xianzhou Luofu here.
- Download all Pom-Pom Gallery - Character Phone Case Exhibition stickers here.
- Download all Pom-Pom Gallery: Second Closed Beta emotes here.
- Download all Pom-Pom Gallery: March 7th emotes here.
- Download all Pom-Pom Gallery: Final Closed Beta stickers here.
- Download all Pom-Pom Gallery: Even Immortality Ends stickers here.
- Download all Pom-Pom Gallery: Pom-Pom stickers (July 2023 Edition) here.
- Download all Celestial Eyes Above Mortal Ruins stickershere.
- Download all Pom-Pom Gallery: Jolted Awake From a Winter Dream emotes here.
- Download all Honkai: Star Rail Sticker Set 10 "The Crepuscule Zone" stickers here.
- Download all Pom-Pom Gallery | Crown of the Mundane and Divine stickers here.
- Download all Pom-Pom Gallery | If One Dreams At Midnight stickers here.
Zenless Zone Zero 
ZZZ Overall Folder here! 
Other Quick Links:
- Download all the Zenless Zone Zero Wallpaper Collection 001 here.
- Download all the Zenless Zone Zero Wallpaper Collection 002 here.
- Download all the Zenless Zone Zero Wallpaper Collection 003 here.
- Download all the Zenless Zone Zero Wallpaper Collection 004 here.
- Download all the Zenless Zone Zero Wallpaper Collection 005 here.
- Download all the Zenless Zone Zero Faction Wallpaper Collection here.
- Download the Zenless Zone Zero 2023 Merry Christmas Wallpaper here.
- Download the Zenless Zone Zero Happy New Year 2024 Wallpaper here.
- Download the ZZZ Jan 2024 Calendar Wallpaper here.
- Download the ZZZ Feb 2024 Calendar Wallpaper here.
- Download all the Zenless Zone Zero Sticker Set 1 — Cunning Hares Everyday Life (Part 1 & 2) emoteshere.
- Download all the Zenless Zone Zero Sticker Pack — Type II's Vacation emoteshere.
- Download all the Zenless Zone Zero Sticker Pack — Dreams Come True | "A Sandwich Scented Dream" here.
- Download all Background Wallpapers from the "A Sandwich-Scented Dream" Web Event here.
