ISO Week · 2021 · Q1
Week 13
2021 · –
March / April · 4 working days · 25% through 2021
Week 13 of 2021 runs March 29, 2021 to April 4, 2021.
Week 13 starts on Monday, March 29, 2021 and ends on Sunday, April 4, 2021. It's the 88th day of the year, sits in Q1, and falls in March / April. By the end of this week, 94 of 365 days are gone, putting 2021 at 25.8%.
This week includes Good Friday, Easter Sunday, so it has 4 working days instead of the usual 5. Need a different week? Browse the full 2021 week calendar, or jump to this week's number.
Week 13 at a glance
The 7 days of week 13
Every date in week 13 of 2021, Monday through Sunday, with day-of-year numbers and events.
| Day | Date | Day no. | Type | Events |
|---|---|---|---|---|
| Monday | Day 88 | Weekday | ||
| Tuesday | Day 89 | Weekday | ||
| Wednesday | Day 90 | Weekday | ||
| Thursday | Day 91 | Weekday | ||
| Friday | Day 92 | Weekday | Good Friday | |
| Saturday | Day 93 | Weekend | ||
| Sunday | Day 94 | Weekend | Easter Sunday |
What week 13 of 2021 means
ISO 8601 numbers weeks so every week starts on Monday and ends on Sunday. Week 1 is the one holding the year's first Thursday, which is why early January can land in week 52 or 53 of the previous year. Week 13 is one piece of that system.
In 2021, week 13 covers Mar 29 – Apr 4, 2021. That's March / April, deep in Q1. The same week number shifts by a day or two each year, so week 13 in 2022 won't share these exact dates. The table below shows how it moves.
Want to check a specific date instead of a week number? The week calculator converts any date to its ISO week. Curious how many weeks a year holds? The weeks in a year guide explains 52 versus 53. And the ISO week number page covers the standard end to end.
Holidays in week 13 of 2021
🇦🇺 Australia
Holy Saturday
NationalWeek 13 across years
The same ISO week number lands on different dates each year. Here's how week 13 shifts.
| Year | From (Mon) | To (Sun) | Notable | |
|---|---|---|---|---|
| 2024 | Good Friday Easter Sunday | view → |
Week 13 of 2021: questions and answers
What days are in week 13 of 2021?
Week 13 of 2021 runs from March 29, 2021 (Monday) through April 4, 2021 (Sunday). It spans March / April.
What month is week 13 in 2021?
Week 13 of 2021 spans two months: it starts in March and ends in April 2021.
How many working days are in week 13 of 2021?
Week 13 of 2021 has 4 working days — reduced from 5 due to Good Friday falling on a weekday.
What week is Good Friday in 2021?
Good Friday falls in ISO week 13 of 2021 (Mar 29 – Apr 4, 2021).
What quarter is week 13 of 2021 in?
Week 13 of 2021 is in Q1 (2021). The week starts on day 88 of 365.
What is ISO week 13?
ISO week 13 is defined by the ISO 8601 international standard. It begins on Monday, March 29, 2021, and ends on Sunday, April 4, 2021. It is week 25% through the ISO year 2021.