RiftMu Event Calendar & Times
Every scheduled fight on RiftMu in one place: when Castle Siege starts, when Icewind Castle opens, and which players and guilds joined the latest battles.
- Times are stored in UTC on the server side and translated into your local timezone for you.
- Filters let you zero in on one event type — Blood Castle, Castle Siege, Boss Battle Together and more.
- The soonest events float to the top, and anything live or in registration gets highlighted automatically.
New to the schedule? See what each event drops and which ones deserve an alarm →
Convert MU event times to your local clock
Global registration overview
A quick look at when each event next opens registration on every realm, shown in server time (UTC).
| Event | PERMANENT |
|---|---|
| Blood Castle | --:--:-- |
| Devil Square | --:--:-- |
| Last Man Standing | --:--:-- |
| Arca War | --:--:-- |
| Chaos Castle | --:--:-- |
| Chaos Castle Survival | --:--:-- |
| Icewind Valley | --:--:-- |
| DoppelGanger | --:--:-- |
| Crywolf | --:--:-- |
| Illusion Temple | --:--:-- |
| Boss Battle Together | --:--:-- |
| Loren Deep | --:--:-- |
| Acheron Guardian | --:--:-- |
| Castle Siege | --:--:-- |
| Illusion Temple League | --:--:-- |
| Tormented Square | --:--:-- |
All registration windows are listed in UTC server time — flip them to local time with the converter above.
What are MU Online events?
Timed events are where MU Online characters get rich: Devil Square, Blood Castle, Chaos Castle, Crywolf, Arca War, Castle Siege and Boss Battle Together hand out huge experience, Jewels, socket items and end-game gear to players who show up regularly and play well.
Instanced events you should not skip
- Blood Castle – Sprint across the bridge, smash the castle gate, clear the monsters inside and carry the Archangel's weapon home for a fat EXP and Jewel payout.
- Devil Square – Waves of tightly packed monsters, a ticking clock, and as much experience and loot as you can farm before time runs out. Devil Square guide
- Chaos Castle – Half arena, half survival test: the floor shrinks while monsters and rival players try to shove you into the void. Outlast everyone to win.
Large-scale guild warfare
- Crywolf Fortress – Hold the Wolf Statue against Balgass. Win and the whole server gets buffed; lose and Kundun's armies grow stronger.
- Castle Siege – The weekly war for the castle itself — winning guilds collect tax income, prestige and the keys to Land of Trials.
- Arca War – Guild-versus-guild warfare spread across Alkmaar, Ubaid and Debenter; holding elemental obelisks earns tokens and bonuses.
- Boss Battle Together – Server-wide co-op raids: parties pile onto huge bosses together for enhancement materials and top-tier drops.
Getting the most out of this schedule
- Do not chase everything: pick two or three events that fit your playtime and track just those timers.
- Realm and event-type filters answer “what's on tonight?” in two clicks.
- The live bar at the top shows what is running right now — check it first whenever you log in.
- Coordinate Siege, Arca War and Boss Battle Together in guild chat early, so the whole roster is ready when registration opens.
Event Questions, Answered
- Which events run on RiftMu?
- The headline wars are Castle Siege, Icewind Castle and Arca Battle, backed up by Blood Castle, Chaos Castle, Devil Square, Crywolf and boss events — each with its own reward pool for players and guilds.
- How do I get into Castle Siege or Icewind Valley?
- Both are guild events: find yourself an active guild first, then show up when the timer on this page hits zero.
- Where are the exact start times listed?
- Right here — this page keeps the schedule for Castle Siege, Icewind Castle and every other event current at all times.