Date and time guides
Clear answers to the small questions that make a big difference when you plan.
A good meeting time needs a date.
Why a time difference can change—and how to keep your next international call on track.
Take a moment to readWeek 1 doesn’t always start on January 1.
A plain-language guide to ISO weeks, week-years, and that surprising week 53.
Take a moment to readWrite a date everyone can read.
Avoid the month/day mix-up with simple, unambiguous date formats for people and files.
Take a moment to readTwo dates. More than one way to count.
Understand inclusive dates, calendar days, and weekdays before calculating your next milestone.
Take a moment to read