Week numbers for 2019
View all week numbers for 2019 in the table below. Each week shows its start and end date according to the ISO 8601 standard.
| Week Numbers 2019: | Start date: | End date: |
|---|---|---|
| week 1 | Mon, Dec 31, 2018 | Sun, Jan 6, 2019 |
| week 2 | Mon, Jan 7, 2019 | Sun, Jan 13, 2019 |
| week 3 | Mon, Jan 14, 2019 | Sun, Jan 20, 2019 |
| week 4 | Mon, Jan 21, 2019 | Sun, Jan 27, 2019 |
| week 5 | Mon, Jan 28, 2019 | Sun, Feb 3, 2019 |
| week 6 | Mon, Feb 4, 2019 | Sun, Feb 10, 2019 |
| week 7 | Mon, Feb 11, 2019 | Sun, Feb 17, 2019 |
| week 8 | Mon, Feb 18, 2019 | Sun, Feb 24, 2019 |
| week 9 | Mon, Feb 25, 2019 | Sun, Mar 3, 2019 |
| week 10 | Mon, Mar 4, 2019 | Sun, Mar 10, 2019 |
| week 11 | Mon, Mar 11, 2019 | Sun, Mar 17, 2019 |
| week 12 | Mon, Mar 18, 2019 | Sun, Mar 24, 2019 |
| week 13 | Mon, Mar 25, 2019 | Sun, Mar 31, 2019 |
| week 14 | Mon, Apr 1, 2019 | Sun, Apr 7, 2019 |
| week 15 | Mon, Apr 8, 2019 | Sun, Apr 14, 2019 |
| week 16 | Mon, Apr 15, 2019 | Sun, Apr 21, 2019 |
| week 17 | Mon, Apr 22, 2019 | Sun, Apr 28, 2019 |
| week 18 | Mon, Apr 29, 2019 | Sun, May 5, 2019 |
| week 19 | Mon, May 6, 2019 | Sun, May 12, 2019 |
| week 20 | Mon, May 13, 2019 | Sun, May 19, 2019 |
| week 21 | Mon, May 20, 2019 | Sun, May 26, 2019 |
| week 22 | Mon, May 27, 2019 | Sun, Jun 2, 2019 |
| week 23 | Mon, Jun 3, 2019 | Sun, Jun 9, 2019 |
| week 24 | Mon, Jun 10, 2019 | Sun, Jun 16, 2019 |
| week 25 | Mon, Jun 17, 2019 | Sun, Jun 23, 2019 |
| week 26 | Mon, Jun 24, 2019 | Sun, Jun 30, 2019 |
| week 27 | Mon, Jul 1, 2019 | Sun, Jul 7, 2019 |
| week 28 | Mon, Jul 8, 2019 | Sun, Jul 14, 2019 |
| week 29 | Mon, Jul 15, 2019 | Sun, Jul 21, 2019 |
| week 30 | Mon, Jul 22, 2019 | Sun, Jul 28, 2019 |
| week 31 | Mon, Jul 29, 2019 | Sun, Aug 4, 2019 |
| week 32 | Mon, Aug 5, 2019 | Sun, Aug 11, 2019 |
| week 33 | Mon, Aug 12, 2019 | Sun, Aug 18, 2019 |
| week 34 | Mon, Aug 19, 2019 | Sun, Aug 25, 2019 |
| week 35 | Mon, Aug 26, 2019 | Sun, Sep 1, 2019 |
| week 36 | Mon, Sep 2, 2019 | Sun, Sep 8, 2019 |
| week 37 | Mon, Sep 9, 2019 | Sun, Sep 15, 2019 |
| week 38 | Mon, Sep 16, 2019 | Sun, Sep 22, 2019 |
| week 39 | Mon, Sep 23, 2019 | Sun, Sep 29, 2019 |
| week 40 | Mon, Sep 30, 2019 | Sun, Oct 6, 2019 |
| week 41 | Mon, Oct 7, 2019 | Sun, Oct 13, 2019 |
| week 42 | Mon, Oct 14, 2019 | Sun, Oct 20, 2019 |
| week 43 | Mon, Oct 21, 2019 | Sun, Oct 27, 2019 |
| week 44 | Mon, Oct 28, 2019 | Sun, Nov 3, 2019 |
| week 45 | Mon, Nov 4, 2019 | Sun, Nov 10, 2019 |
| week 46 | Mon, Nov 11, 2019 | Sun, Nov 17, 2019 |
| week 47 | Mon, Nov 18, 2019 | Sun, Nov 24, 2019 |
| week 48 | Mon, Nov 25, 2019 | Sun, Dec 1, 2019 |
| week 49 | Mon, Dec 2, 2019 | Sun, Dec 8, 2019 |
| week 50 | Mon, Dec 9, 2019 | Sun, Dec 15, 2019 |
| week 51 | Mon, Dec 16, 2019 | Sun, Dec 22, 2019 |
| week 52 | Mon, Dec 23, 2019 | Sun, Dec 29, 2019 |
What is a week number?
A week number is the sequential number assigned to each week in a calendar year. We use the ISO 8601 international standard, where each week begins on Monday and runs through Sunday.
Calendar with week numbers
The calendar consists of 12 months. To reference smaller time periods, week numbers provide a convenient solution. Many activities are scheduled for a specific week when an exact date isn't yet confirmed. Week numbers offer a practical way to communicate these timeframes.
Week numbers for 2019
Every week runs from Monday to Sunday. Week 1 is the week with the first Thursday of January, following the ISO 8601 standard used in business, logistics and most of the world outside the US.
The current week number is determined by the date. January 4 always falls in the first week of the year - this is the standard rule. Because of this, February 1 always falls in week 5.
You can calculate the current week number yourself by counting the elapsed weeks or checking a calendar. However, this is time-consuming, which is why we provide a complete overview for each year showing all week numbers with their start and end dates.
What is the week number this week?
Week numbers are particularly important for maintaining organized schedules and coordinating with others. Our tools make it easy to track week numbers throughout the year.
FAQ
How many weeks are in 2019?
The year 2019 has 52 weeks. This is determined by the ISO 8601 standard where week 1 is the first week with at least 4 days in January.
When does week 1 of 2019 start?
Week 1 of 2019 begins on the Monday closest to January 1, as long as at least 4 days fall in January.
How are week numbers determined?
We use the ISO 8601 international standard. Each week starts on Monday, and week 1 is the first week with at least 4 days in the new year. This means January 4 always falls in week 1.
See also: Calendar 2019