How to read the 2027 calendar
Each month is shown as a grid running from Monday to Sunday. The first column, Wk, gives the ISO week number of that row. Weekends are on the right, and today’s date is marked when it falls in 2027. Days that belong to the previous or next month are left blank, so each grid shows one month only.
Because ISO weeks start on Monday, a single week can appear in two month grids: a week that starts at the end of one month and ends at the beginning of the next has the same number in both.
The table of all weeks
After the twelve months, the table All weeks of 2027 lists week 1 to the last week of the ISO year, each with its Monday and its Sunday. Note that week 1 can begin in the last days of December of the previous year, and the last week can end in early January of the next year. That is normal for ISO weeks: every week belongs to the year that contains its Thursday.
ISO week rules at a glance
| Rule | Detail |
|---|---|
| First day of the week | Monday |
| Week 1 | The week containing the first Thursday of the year (the week of 4 January) |
| Weeks per year | 52 or 53 |
| 53-week years | Years starting on a Thursday, and leap years starting on a Wednesday |
| 1 January on Friday, Saturday or Sunday | Belongs to the last week of the previous year |
Common uses
- Printing a wall or desk calendar with week numbers for planning.
- Matching dates to the week numbers used in schedules, delivery plans or school timetables.
- Checking quickly which dates a given week covers in 2027.
Printing and saving as PDF
Use the Print button at the top of the calendar. The buttons are left out of the printout. In the print dialog, choose Save as PDF if you want a file, and landscape orientation if you prefer more room for the months.
Good to know
- Some calendars number weeks differently, for example starting on Sunday or always placing 1 January in week 1. Those numbers can differ from ISO weeks by one around the start and the end of the year.
- To see today’s week and look up the week of any date, open today’s week number.
- To find a date a number of weeks away, add or subtract days from a date; the result includes its ISO week.