UFC 323 takes place on Saturday, December 6, 2025, with the early prelims starting at 6 p.m. ET, the main prelims around 8 p.m. ET, and the main card kicking off at 10 p.m. ET from T-Mobile Arena in Las Vegas.

Quick Scoop

  • Event date: Saturday, December 6, 2025 (local Vegas/U.S. schedule).
  • Venue: T-Mobile Arena, Las Vegas, Nevada.
  • Early prelims start: 6 p.m. ET (U.S.), typically on Fight Pass/ESPN+.
  • Prelims start: 8 p.m. ET on ESPN2/ESPN platforms (exact network can vary slightly by region).
  • Main card start: 10 p.m. ET on PPV (ESPN+ PPV in the U.S.).

Time zone notes

  • If you are in Pacific Time (US West Coast) , the main card is expected to start around 7 p.m. PT. This lines up with the usual three‑hour difference from Eastern Time for UFC PPVs.
  • In Central Europe (e.g., Germany) , the main card is listed to start at 4:00 a.m. local time on Sunday, December 7, 2025 , due to the time difference from Las Vegas.

Why start times matter

  • UFC 323 is billed as the final ESPN+ PPV of 2025 , so there is heightened interest and heavy promotion around the exact start times.
  • With two title fights (including Merab Dvalishvili vs. Petr Yan 2 at bantamweight), the promotion is following its standard PPV structure: early prelims, prelims, then a five‑fight main card beginning at 10 p.m. ET.

Mini viewing checklist

  • Decide whether you want to catch:
    • Only the main card (tune in by 10 p.m. ET / 7 p.m. PT).
* The **full night** from early prelims (start watching at 6 p.m. ET).
  • Double‑check your local broadcaster or streaming app on event day, since regional partners (like DAZN or local TV channels) sometimes list slightly adjusted coverage windows even though the live fight schedule in Vegas stays the same.

Short TL;DR

UFC 323 “officially” gets going with early prelims at 6 p.m. ET , but the big PPV main card that most fans mean when they ask “when does UFC 323 start?” begins at 10 p.m. ET (7 p.m. PT, 4 a.m. in Central Europe on Sunday).

Information gathered from public forums or data available on the internet and portrayed here.