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Pick a date to see the day that is 28 days (4 weeks) before it.

Pick a date and the day 28 days before it appears at once. The same count answers 28 days prior to a date and a date minus 28 days.

28 days (4 weeks) before the date

Tuesday

September 29, 2026

28 days before Tuesday, October 27, 2026 is Tuesday, September 29, 2026.

In weeks
4 weeks
Weekdays crossed
20
Day of the year
Day 272

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The date you pick is day zero, and day 28 counting back is the answer.

The day before the date you pick is day 1, and the count runs to day 28. The date you pick is not counted and the answer is, which is how the date calculator counts too.

28 days (4 weeks) before Thursday, December 31, 2026 is Thursday, December 3, 2026.

Here is the date 28 days (4 weeks) before every day of the next 12 months.

Each box shows a day of the month in bold and, under it, the date 28 days (4 weeks) before that day. The 1st, the 15th and the last day of each month are also written out as sentences.

Here is the date 28 days (4 weeks) before each day of October 2026.

The small dates fall in 2026.

October 2026: each box shows the day of the month and, under it, the date 28 days (4 weeks) before that day
SMTWTFS
1Sep 32Sep 43Sep 5
4Sep 65Sep 76Sep 87Sep 98Sep 109Sep 1110Sep 12
11Sep 1312Sep 1413Sep 1514Sep 1615Sep 1716Sep 1817Sep 19
18Sep 2019Sep 2120Sep 2221Sep 2322Sep 2423Sep 2524Sep 26
25Sep 2726Sep 2827Sep 2928Sep 3029Oct 130Oct 231Oct 3
  • 28 days before Thursday, October 1, 2026 is Thursday, September 3, 2026.
  • 28 days before Thursday, October 15, 2026 is Thursday, September 17, 2026.
  • 28 days before Saturday, October 31, 2026 is Saturday, October 3, 2026.

Here is the date 28 days (4 weeks) before each day of November 2026.

The small dates fall in 2026.

November 2026: each box shows the day of the month and, under it, the date 28 days (4 weeks) before that day
SMTWTFS
1Oct 42Oct 53Oct 64Oct 75Oct 86Oct 97Oct 10
8Oct 119Oct 1210Oct 1311Oct 1412Oct 1513Oct 1614Oct 17
15Oct 1816Oct 1917Oct 2018Oct 2119Oct 2220Oct 2321Oct 24
22Oct 2523Oct 2624Oct 2725Oct 2826Oct 2927Oct 3028Oct 31
29Nov 130Nov 2
  • 28 days before Sunday, November 1, 2026 is Sunday, October 4, 2026.
  • 28 days before Sunday, November 15, 2026 is Sunday, October 18, 2026.
  • 28 days before Monday, November 30, 2026 is Monday, November 2, 2026.

Here is the date 28 days (4 weeks) before each day of December 2026.

The small dates fall in 2026.

December 2026: each box shows the day of the month and, under it, the date 28 days (4 weeks) before that day
SMTWTFS
1Nov 32Nov 43Nov 54Nov 65Nov 7
6Nov 87Nov 98Nov 109Nov 1110Nov 1211Nov 1312Nov 14
13Nov 1514Nov 1615Nov 1716Nov 1817Nov 1918Nov 2019Nov 21
20Nov 2221Nov 2322Nov 2423Nov 2524Nov 2625Nov 2726Nov 28
27Nov 2928Nov 3029Dec 130Dec 231Dec 3
  • 28 days before Tuesday, December 1, 2026 is Tuesday, November 3, 2026.
  • 28 days before Tuesday, December 15, 2026 is Tuesday, November 17, 2026.
  • 28 days before Thursday, December 31, 2026 is Thursday, December 3, 2026.

Here is the date 28 days (4 weeks) before each day of January 2027.

The small dates fall in 2026 and 2027.

January 2027: each box shows the day of the month and, under it, the date 28 days (4 weeks) before that day
SMTWTFS
1Dec 42Dec 5
3Dec 64Dec 75Dec 86Dec 97Dec 108Dec 119Dec 12
10Dec 1311Dec 1412Dec 1513Dec 1614Dec 1715Dec 1816Dec 19
17Dec 2018Dec 2119Dec 2220Dec 2321Dec 2422Dec 2523Dec 26
24Dec 2725Dec 2826Dec 2927Dec 3028Dec 3129Jan 130Jan 2
31Jan 3
  • 28 days before Friday, January 1, 2027 is Friday, December 4, 2026.
  • 28 days before Friday, January 15, 2027 is Friday, December 18, 2026.
  • 28 days before Sunday, January 31, 2027 is Sunday, January 3, 2027.

Here is the date 28 days (4 weeks) before each day of February 2027.

The small dates fall in 2027.

February 2027: each box shows the day of the month and, under it, the date 28 days (4 weeks) before that day
SMTWTFS
1Jan 42Jan 53Jan 64Jan 75Jan 86Jan 9
7Jan 108Jan 119Jan 1210Jan 1311Jan 1412Jan 1513Jan 16
14Jan 1715Jan 1816Jan 1917Jan 2018Jan 2119Jan 2220Jan 23
21Jan 2422Jan 2523Jan 2624Jan 2725Jan 2826Jan 2927Jan 30
28Jan 31
  • 28 days before Monday, February 1, 2027 is Monday, January 4, 2027.
  • 28 days before Monday, February 15, 2027 is Monday, January 18, 2027.
  • 28 days before Sunday, February 28, 2027 is Sunday, January 31, 2027.

Here is the date 28 days (4 weeks) before each day of March 2027.

The small dates fall in 2027.

March 2027: each box shows the day of the month and, under it, the date 28 days (4 weeks) before that day
SMTWTFS
1Feb 12Feb 23Feb 34Feb 45Feb 56Feb 6
7Feb 78Feb 89Feb 910Feb 1011Feb 1112Feb 1213Feb 13
14Feb 1415Feb 1516Feb 1617Feb 1718Feb 1819Feb 1920Feb 20
21Feb 2122Feb 2223Feb 2324Feb 2425Feb 2526Feb 2627Feb 27
28Feb 2829Mar 130Mar 231Mar 3
  • 28 days before Monday, March 1, 2027 is Monday, February 1, 2027.
  • 28 days before Monday, March 15, 2027 is Monday, February 15, 2027.
  • 28 days before Wednesday, March 31, 2027 is Wednesday, March 3, 2027.

Here is the date 28 days (4 weeks) before each day of April 2027.

The small dates fall in 2027.

April 2027: each box shows the day of the month and, under it, the date 28 days (4 weeks) before that day
SMTWTFS
1Mar 42Mar 53Mar 6
4Mar 75Mar 86Mar 97Mar 108Mar 119Mar 1210Mar 13
11Mar 1412Mar 1513Mar 1614Mar 1715Mar 1816Mar 1917Mar 20
18Mar 2119Mar 2220Mar 2321Mar 2422Mar 2523Mar 2624Mar 27
25Mar 2826Mar 2927Mar 3028Mar 3129Apr 130Apr 2
  • 28 days before Thursday, April 1, 2027 is Thursday, March 4, 2027.
  • 28 days before Thursday, April 15, 2027 is Thursday, March 18, 2027.
  • 28 days before Friday, April 30, 2027 is Friday, April 2, 2027.

Here is the date 28 days (4 weeks) before each day of May 2027.

The small dates fall in 2027.

May 2027: each box shows the day of the month and, under it, the date 28 days (4 weeks) before that day
SMTWTFS
1Apr 3
2Apr 43Apr 54Apr 65Apr 76Apr 87Apr 98Apr 10
9Apr 1110Apr 1211Apr 1312Apr 1413Apr 1514Apr 1615Apr 17
16Apr 1817Apr 1918Apr 2019Apr 2120Apr 2221Apr 2322Apr 24
23Apr 2524Apr 2625Apr 2726Apr 2827Apr 2928Apr 3029May 1
30May 231May 3
  • 28 days before Saturday, May 1, 2027 is Saturday, April 3, 2027.
  • 28 days before Saturday, May 15, 2027 is Saturday, April 17, 2027.
  • 28 days before Monday, May 31, 2027 is Monday, May 3, 2027.

Here is the date 28 days (4 weeks) before each day of June 2027.

The small dates fall in 2027.

June 2027: each box shows the day of the month and, under it, the date 28 days (4 weeks) before that day
SMTWTFS
1May 42May 53May 64May 75May 8
6May 97May 108May 119May 1210May 1311May 1412May 15
13May 1614May 1715May 1816May 1917May 2018May 2119May 22
20May 2321May 2422May 2523May 2624May 2725May 2826May 29
27May 3028May 3129Jun 130Jun 2
  • 28 days before Tuesday, June 1, 2027 is Tuesday, May 4, 2027.
  • 28 days before Tuesday, June 15, 2027 is Tuesday, May 18, 2027.
  • 28 days before Wednesday, June 30, 2027 is Wednesday, June 2, 2027.

Here is the date 28 days (4 weeks) before each day of July 2027.

The small dates fall in 2027.

July 2027: each box shows the day of the month and, under it, the date 28 days (4 weeks) before that day
SMTWTFS
1Jun 32Jun 43Jun 5
4Jun 65Jun 76Jun 87Jun 98Jun 109Jun 1110Jun 12
11Jun 1312Jun 1413Jun 1514Jun 1615Jun 1716Jun 1817Jun 19
18Jun 2019Jun 2120Jun 2221Jun 2322Jun 2423Jun 2524Jun 26
25Jun 2726Jun 2827Jun 2928Jun 3029Jul 130Jul 231Jul 3
  • 28 days before Thursday, July 1, 2027 is Thursday, June 3, 2027.
  • 28 days before Thursday, July 15, 2027 is Thursday, June 17, 2027.
  • 28 days before Saturday, July 31, 2027 is Saturday, July 3, 2027.

Here is the date 28 days (4 weeks) before each day of August 2027.

The small dates fall in 2027.

August 2027: each box shows the day of the month and, under it, the date 28 days (4 weeks) before that day
SMTWTFS
1Jul 42Jul 53Jul 64Jul 75Jul 86Jul 97Jul 10
8Jul 119Jul 1210Jul 1311Jul 1412Jul 1513Jul 1614Jul 17
15Jul 1816Jul 1917Jul 2018Jul 2119Jul 2220Jul 2321Jul 24
22Jul 2523Jul 2624Jul 2725Jul 2826Jul 2927Jul 3028Jul 31
29Aug 130Aug 231Aug 3
  • 28 days before Sunday, August 1, 2027 is Sunday, July 4, 2027.
  • 28 days before Sunday, August 15, 2027 is Sunday, July 18, 2027.
  • 28 days before Tuesday, August 31, 2027 is Tuesday, August 3, 2027.

Here is the date 28 days (4 weeks) before each day of September 2027.

The small dates fall in 2027.

September 2027: each box shows the day of the month and, under it, the date 28 days (4 weeks) before that day
SMTWTFS
1Aug 42Aug 53Aug 64Aug 7
5Aug 86Aug 97Aug 108Aug 119Aug 1210Aug 1311Aug 14
12Aug 1513Aug 1614Aug 1715Aug 1816Aug 1917Aug 2018Aug 21
19Aug 2220Aug 2321Aug 2422Aug 2523Aug 2624Aug 2725Aug 28
26Aug 2927Aug 3028Aug 3129Sep 130Sep 2
  • 28 days before Wednesday, September 1, 2027 is Wednesday, August 4, 2027.
  • 28 days before Wednesday, September 15, 2027 is Wednesday, August 18, 2027.
  • 28 days before Thursday, September 30, 2027 is Thursday, September 2, 2027.

The other direction and the other lengths have their own pages.

See 28 days (4 weeks) after a date instead

The date calculator takes a question in plain words, such as 90 days before January 31 2027 or 10 days before Nov 3, and the days between dates calculator counts the gap between two dates.

Here are five questions about 28 days (4 weeks) before a date, answered.

What is 28 days before a date?
Count back 28 days from the date, with the date itself as day zero. For example, 28 days before Thursday, December 31, 2026 is Thursday, December 3, 2026.
Is 28 days prior to a date the same as 28 days before it?
Yes. 28 days before a date, 28 days prior to a date and a date minus 28 days all ask for the same day. For Thursday, December 31, 2026, all three give Thursday, December 3, 2026.
Does 28 days before a date count the date itself?
No. The date you pick is day zero, the next day back is day 1 and day 28 is the answer, so the answer is counted and the date you pick is not. If a policy or contract counts the date you pick as day 1, the answer moves one day later, to Friday, December 4, 2026 for Thursday, December 31, 2026.
Is 28 days before a date the same as 4 weeks or one month before it?
It is the same as 4 weeks and not always the same as one month. For Thursday, December 31, 2026, 28 days before it is Thursday, December 3, 2026, while one month before it is Monday, November 30, 2026, which is 31 days away. A month runs from 28 to 31 days.
Can I type the date as 1/31/2027 or January 31 2027?
The date field above uses your device's date format. To type the whole question in words, such as 28 days before January 31 2027 or 28 days prior to 1/31/2027, use the question box on the date calculator.

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