Yesterday's Date - What Was The Date Yesterday?

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Yesterday's date in numbers

Date Format	Date Yesterday
mm/dd/yyyy	01/31/2026
dd/mm/yyyy	31/01/2026
yyyy-mm-dd	2026-01-31
yyyy-dd-mm	2026-31-01

Yesterday's Day of The Week

The day of the week yesterday was Saturday, and its abbreviation is Sat. In most parts of the world, Saturday day number of the week is 6, while in the United States it is 7

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What Day of The Year was it Yesterday's Date?

Yesterday's day number of the year was 31

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Week Number of the Year Yesterday

Yesterday's was week number 05 of the year 2026

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Yesterday's Month Number

The month number of yesterday's date was 1, the month of January.

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Yesterday's UTC Date in Other Date Formats

Date Format	Date Yesterday
ISO-8601	2026-01-31T06:32:35+00:00
RFC 2822	Sat, 31 Jan 2026 06:32:35 +0000
Ordinal numbers	Saturday Jan 31st 2026