2033 has 52 ISO weeks. It begins on a Saturday; only years that begin on a Thursday, or on a Wednesday in a leap year, have 53 weeks.
ISO 8601 numbers the weeks of a year from 1 to 52 or 53. Weeks run from Monday to Sunday, and week 1 is the week that holds the first Thursday of the year, which is also the week that contains 4 January. Each week belongs to the year that contains its Thursday.
Questions
Good to know
How many weeks are there in 2033?
2033 has 52 ISO weeks (52 or 53 in any year).
When does week 1 of 2033 start?
Week 1 of 2033 runs Mon 3 Jan – Sun, 9 Jan 2033. It is the week that contains 4 January 2033.
Which years after 2033 have 53 weeks?
2037, 2043, 2048, 2054. A year has 53 ISO weeks when 1 January is a Thursday, or a Wednesday in a leap year.
How do I get a printable list or calendar?
Use the print button above for this list of weeks, or open the printable calendar of your country: it marks the public holidays and shows the ISO week number of every week.