Unit 25 Calendar
UNIT 25 日历
The calendar shows days, weeks, months, and years
.There are 24 hours in a day and there are seven days in a week.
Also, there are 365 days and 12 months in a year.
Did you know that the old version of the Roman calendar had 304 days and 10 months in a year?
The new year started with March.
But Julius Caesar made the calendar start with the month of January.