Guides

The questions behind the tools, answered properly.

• How many weeks are in a year?

  52 weeks and a day or two left over, which is why some years get a 53rd. The rule, and which years are long.

• ISO vs US week numbers

  Two conventions, two answers for the same date. Why calendars disagree and how to make a spreadsheet match Europe.

• Showing week numbers in your calendar

  Outlook, Google Calendar and Apple Calendar each hide the setting somewhere different.

• Bridge days and how to spend leave well

  A holiday on a Tuesday leaves one working day stranded. Taking it turns one day off into four.