Here are some facts relating to time in Ultima Online:
- Time in Britannia passes quickly compared to our Earth time.
- In 2 Earth hours an entire Britannian day will have passed.
- Twelve Britannian days makes one Earth day.
- Just as on Earth, a Britannian year has twelve months.
- Each Britannian month, however, consists of 73 days.
- This makes a Britannian year last 876 Britannian days, which is 73 Earth days.
- One Earth year equals five Britannian years.
- The release date of Ultima Online was in the Britannian year 289.