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Pick a date to see the day that is 30 days before it.

Pick a date and the day 30 days before it appears at once. The same count answers 30 days prior to a date and a date minus 30 days.

30 days before the date

Sunday

September 27, 2026

30 days before Tuesday, October 27, 2026 is Sunday, September 27, 2026.

In weeks
4 weeks and 2 days
Weekdays crossed
21
Day of the year
Day 270

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The date you pick is day zero, and day 30 counting back is the answer.

The day before the date you pick is day 1, and the count runs to day 30. The date you pick is not counted and the answer is, which is how the date calculator counts too.

30 days before Thursday, December 31, 2026 is Tuesday, December 1, 2026.

Here is the date 30 days before every day of the next 12 months.

Each box shows a day of the month in bold and, under it, the date 30 days before that day. The 1st, the 15th and the last day of each month are also written out as sentences.

Here is the date 30 days 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 30 days before that day
SMTWTFS
1Sep 12Sep 23Sep 3
4Sep 45Sep 56Sep 67Sep 78Sep 89Sep 910Sep 10
11Sep 1112Sep 1213Sep 1314Sep 1415Sep 1516Sep 1617Sep 17
18Sep 1819Sep 1920Sep 2021Sep 2122Sep 2223Sep 2324Sep 24
25Sep 2526Sep 2627Sep 2728Sep 2829Sep 2930Sep 3031Oct 1
  • 30 days before Thursday, October 1, 2026 is Tuesday, September 1, 2026.
  • 30 days before Thursday, October 15, 2026 is Tuesday, September 15, 2026.
  • 30 days before Saturday, October 31, 2026 is Thursday, October 1, 2026.

Here is the date 30 days 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 30 days before that day
SMTWTFS
1Oct 22Oct 33Oct 44Oct 55Oct 66Oct 77Oct 8
8Oct 99Oct 1010Oct 1111Oct 1212Oct 1313Oct 1414Oct 15
15Oct 1616Oct 1717Oct 1818Oct 1919Oct 2020Oct 2121Oct 22
22Oct 2323Oct 2424Oct 2525Oct 2626Oct 2727Oct 2828Oct 29
29Oct 3030Oct 31
  • 30 days before Sunday, November 1, 2026 is Friday, October 2, 2026.
  • 30 days before Sunday, November 15, 2026 is Friday, October 16, 2026.
  • 30 days before Monday, November 30, 2026 is Saturday, October 31, 2026.

Here is the date 30 days 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 30 days before that day
SMTWTFS
1Nov 12Nov 23Nov 34Nov 45Nov 5
6Nov 67Nov 78Nov 89Nov 910Nov 1011Nov 1112Nov 12
13Nov 1314Nov 1415Nov 1516Nov 1617Nov 1718Nov 1819Nov 19
20Nov 2021Nov 2122Nov 2223Nov 2324Nov 2425Nov 2526Nov 26
27Nov 2728Nov 2829Nov 2930Nov 3031Dec 1
  • 30 days before Tuesday, December 1, 2026 is Sunday, November 1, 2026.
  • 30 days before Tuesday, December 15, 2026 is Sunday, November 15, 2026.
  • 30 days before Thursday, December 31, 2026 is Tuesday, December 1, 2026.

Here is the date 30 days 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 30 days before that day
SMTWTFS
1Dec 22Dec 3
3Dec 44Dec 55Dec 66Dec 77Dec 88Dec 99Dec 10
10Dec 1111Dec 1212Dec 1313Dec 1414Dec 1515Dec 1616Dec 17
17Dec 1818Dec 1919Dec 2020Dec 2121Dec 2222Dec 2323Dec 24
24Dec 2525Dec 2626Dec 2727Dec 2828Dec 2929Dec 3030Dec 31
31Jan 1
  • 30 days before Friday, January 1, 2027 is Wednesday, December 2, 2026.
  • 30 days before Friday, January 15, 2027 is Wednesday, December 16, 2026.
  • 30 days before Sunday, January 31, 2027 is Friday, January 1, 2027.

Here is the date 30 days 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 30 days before that day
SMTWTFS
1Jan 22Jan 33Jan 44Jan 55Jan 66Jan 7
7Jan 88Jan 99Jan 1010Jan 1111Jan 1212Jan 1313Jan 14
14Jan 1515Jan 1616Jan 1717Jan 1818Jan 1919Jan 2020Jan 21
21Jan 2222Jan 2323Jan 2424Jan 2525Jan 2626Jan 2727Jan 28
28Jan 29
  • 30 days before Monday, February 1, 2027 is Saturday, January 2, 2027.
  • 30 days before Monday, February 15, 2027 is Saturday, January 16, 2027.
  • 30 days before Sunday, February 28, 2027 is Friday, January 29, 2027.

Here is the date 30 days 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 30 days before that day
SMTWTFS
1Jan 302Jan 313Feb 14Feb 25Feb 36Feb 4
7Feb 58Feb 69Feb 710Feb 811Feb 912Feb 1013Feb 11
14Feb 1215Feb 1316Feb 1417Feb 1518Feb 1619Feb 1720Feb 18
21Feb 1922Feb 2023Feb 2124Feb 2225Feb 2326Feb 2427Feb 25
28Feb 2629Feb 2730Feb 2831Mar 1
  • 30 days before Monday, March 1, 2027 is Saturday, January 30, 2027.
  • 30 days before Monday, March 15, 2027 is Saturday, February 13, 2027.
  • 30 days before Wednesday, March 31, 2027 is Monday, March 1, 2027.

Here is the date 30 days 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 30 days before that day
SMTWTFS
1Mar 22Mar 33Mar 4
4Mar 55Mar 66Mar 77Mar 88Mar 99Mar 1010Mar 11
11Mar 1212Mar 1313Mar 1414Mar 1515Mar 1616Mar 1717Mar 18
18Mar 1919Mar 2020Mar 2121Mar 2222Mar 2323Mar 2424Mar 25
25Mar 2626Mar 2727Mar 2828Mar 2929Mar 3030Mar 31
  • 30 days before Thursday, April 1, 2027 is Tuesday, March 2, 2027.
  • 30 days before Thursday, April 15, 2027 is Tuesday, March 16, 2027.
  • 30 days before Friday, April 30, 2027 is Wednesday, March 31, 2027.

Here is the date 30 days 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 30 days before that day
SMTWTFS
1Apr 1
2Apr 23Apr 34Apr 45Apr 56Apr 67Apr 78Apr 8
9Apr 910Apr 1011Apr 1112Apr 1213Apr 1314Apr 1415Apr 15
16Apr 1617Apr 1718Apr 1819Apr 1920Apr 2021Apr 2122Apr 22
23Apr 2324Apr 2425Apr 2526Apr 2627Apr 2728Apr 2829Apr 29
30Apr 3031May 1
  • 30 days before Saturday, May 1, 2027 is Thursday, April 1, 2027.
  • 30 days before Saturday, May 15, 2027 is Thursday, April 15, 2027.
  • 30 days before Monday, May 31, 2027 is Saturday, May 1, 2027.

Here is the date 30 days 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 30 days before that day
SMTWTFS
1May 22May 33May 44May 55May 6
6May 77May 88May 99May 1010May 1111May 1212May 13
13May 1414May 1515May 1616May 1717May 1818May 1919May 20
20May 2121May 2222May 2323May 2424May 2525May 2626May 27
27May 2828May 2929May 3030May 31
  • 30 days before Tuesday, June 1, 2027 is Sunday, May 2, 2027.
  • 30 days before Tuesday, June 15, 2027 is Sunday, May 16, 2027.
  • 30 days before Wednesday, June 30, 2027 is Monday, May 31, 2027.

Here is the date 30 days 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 30 days before that day
SMTWTFS
1Jun 12Jun 23Jun 3
4Jun 45Jun 56Jun 67Jun 78Jun 89Jun 910Jun 10
11Jun 1112Jun 1213Jun 1314Jun 1415Jun 1516Jun 1617Jun 17
18Jun 1819Jun 1920Jun 2021Jun 2122Jun 2223Jun 2324Jun 24
25Jun 2526Jun 2627Jun 2728Jun 2829Jun 2930Jun 3031Jul 1
  • 30 days before Thursday, July 1, 2027 is Tuesday, June 1, 2027.
  • 30 days before Thursday, July 15, 2027 is Tuesday, June 15, 2027.
  • 30 days before Saturday, July 31, 2027 is Thursday, July 1, 2027.

Here is the date 30 days 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 30 days before that day
SMTWTFS
1Jul 22Jul 33Jul 44Jul 55Jul 66Jul 77Jul 8
8Jul 99Jul 1010Jul 1111Jul 1212Jul 1313Jul 1414Jul 15
15Jul 1616Jul 1717Jul 1818Jul 1919Jul 2020Jul 2121Jul 22
22Jul 2323Jul 2424Jul 2525Jul 2626Jul 2727Jul 2828Jul 29
29Jul 3030Jul 3131Aug 1
  • 30 days before Sunday, August 1, 2027 is Friday, July 2, 2027.
  • 30 days before Sunday, August 15, 2027 is Friday, July 16, 2027.
  • 30 days before Tuesday, August 31, 2027 is Sunday, August 1, 2027.

Here is the date 30 days 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 30 days before that day
SMTWTFS
1Aug 22Aug 33Aug 44Aug 5
5Aug 66Aug 77Aug 88Aug 99Aug 1010Aug 1111Aug 12
12Aug 1313Aug 1414Aug 1515Aug 1616Aug 1717Aug 1818Aug 19
19Aug 2020Aug 2121Aug 2222Aug 2323Aug 2424Aug 2525Aug 26
26Aug 2727Aug 2828Aug 2929Aug 3030Aug 31
  • 30 days before Wednesday, September 1, 2027 is Monday, August 2, 2027.
  • 30 days before Wednesday, September 15, 2027 is Monday, August 16, 2027.
  • 30 days before Thursday, September 30, 2027 is Tuesday, August 31, 2027.

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

See 30 days after a date instead

If the date is today, the 30 days ago page gives the answer for today's date. 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 30 days before a date, answered.

What is 30 days before a date?
Count back 30 days from the date, with the date itself as day zero. For example, 30 days before Thursday, December 31, 2026 is Tuesday, December 1, 2026.
Is 30 days prior to a date the same as 30 days before it?
Yes. 30 days before a date, 30 days prior to a date and a date minus 30 days all ask for the same day. For Thursday, December 31, 2026, all three give Tuesday, December 1, 2026.
Does 30 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 30 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 Wednesday, December 2, 2026 for Thursday, December 31, 2026.
Is 30 days before a date the same as one month before it?
Not always. For Thursday, December 31, 2026, one month before it is Monday, November 30, 2026, which is 31 days away, while 30 days before it is Tuesday, December 1, 2026. 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 30 days before January 31 2027 or 30 days prior to 1/31/2027, use the question box on the date calculator.

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