Weeks guides

Clear explanations that support the week explorer.

Current week number

Find this week's ISO number and week-year.

Read dates written as week-year, week number and weekday.

Calculate the Monday and Sunday surrounding a date.

Understand why ISO years contain 52 or 53 weeks.

Identify ISO years with an additional numbered week.

Measure a date interval in complete or fractional weeks.

Distinguish scheduled working days from a seven-day period.

Turn a Monday-to-Sunday range into a workable plan.