Clear answers to common questions about time, calendars, and clocks.
There are 52 weeks and 1 day in a standard year. See the full breakdown by year, work weeks, and ISO week numbers.
A regular year has 365 days, a leap year has 366. Monthly breakdown, working days, and different calendar systems compared.
AM means Ante Meridiem (before midday), PM means Post Meridiem (after midday). Full 12-hour to 24-hour conversion chart included.