Week 16 of 2021 runs April 19, 2021 to April 25, 2021.
Week 16 starts on Monday, April 19, 2021 and ends on Sunday, April 25, 2021. It's the 109th day of the year, sits in Q2, and falls in April. By the end of this week, 115 of 365 days are gone, putting 2021 at 31.5%.
This week includes Earth Day, ANZAC Day, so it has 5 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 16 at a glance
The 7 days of week 16
Every date in week 16 of 2021, Monday through Sunday, with day-of-year numbers and events.
| Day | Date | Day no. | Type | Events |
|---|---|---|---|---|
| Monday | Day 109 | Weekday | ||
| Tuesday | Day 110 | Weekday | ||
| Wednesday | Day 111 | Weekday | ||
| Thursday | Day 112 | Weekday | Earth Day | |
| Friday | Day 113 | Weekday | ||
| Saturday | Day 114 | Weekend | ||
| Sunday | Day 115 | Weekend | ANZAC Day |
What week 16 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 16 is one piece of that system.
In 2021, week 16 covers Apr 19 – Apr 25, 2021. That's April, deep in Q2. The same week number shifts by a day or two each year, so week 16 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 16 of 2021
Week 16 across years
The same ISO week number lands on different dates each year. Here's how week 16 shifts.
| Year | From (Mon) | To (Sun) | Notable | |
|---|---|---|---|---|
| 2024 | view → |
Week 16 of 2021: questions and answers
What days are in week 16 of 2021?
Week 16 of 2021 runs from April 19, 2021 (Monday) through April 25, 2021 (Sunday). It spans April.
What month is week 16 in 2021?
Week 16 of 2021 falls entirely in April 2021.
How many working days are in week 16 of 2021?
Week 16 of 2021 has 5 working days.
What week is Earth Day in 2021?
Earth Day falls in ISO week 16 of 2021 (Apr 19 – Apr 25, 2021).
What quarter is week 16 of 2021 in?
Week 16 of 2021 is in Q2 (2021). The week starts on day 109 of 365.
What is ISO week 16?
ISO week 16 is defined by the ISO 8601 international standard. It begins on Monday, April 19, 2021, and ends on Sunday, April 25, 2021. It is week 31% through the ISO year 2021.