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Dec 18, 2021 20:31:45

2021

Year

12

Month

18

Day

20

Hour (24)

31

Minute

45

Second

How long ago was

Format

ISO 8601 International standard for representing date and time. Widely used in web services, programming, and data exchange. YYYY-MM-DD'T'HH:MM:SS±hh:mm	2021-12-18T20:31:45
ISO 8601 (Week) Used in planning and reporting YYYY-Www-D	2021-W50-6T20:31:45
RFC 3339 Used in Internet protocols YYYY-MM-DD'T'HH:mm:ss'Z'	2021-12-18T20:31:45Z
RFC 822 / RFC 2822 Used in email protocols ddd, DD MMM YYYY HH:mm:ss 'GMT'	Sat, 18 Dec 2021 20:31:45 +0000
RFC 7231 The format aligns with RFC 822, but RFC 7231 specifies and standardizes its use in HTTP Day, DD Mon YYYY HH:MM:SS GMT	Sat, 18 Dec 2021 20:31:45 +0000
UNIX Time (Epoch Time) Widely used in programming Seconds since January 1, 1970	1639859505
ISO 9075 A standard related to SQL query language YYYY-MM-DD HH:MM:SS	2021-12-18 20:31:45
USA Date format commonly used in the USA MM/DD/YYYY HH:MM:SS	12-18-2021 20:31:45
British/French, EU Date format commonly used in Europe DD/MM/YY HH:MM:SS	18/12/2021 20:31:45
German Date format commonly used in Germany DD.MM.YYYY HH:MM:SS	18.12.2021 20:31:45
Italian Date format commonly used in Italy DD-MM-YYYY HH:MM:SS	18-12-2021 20:31:45
Japan Date format commonly used in Japan YYYY/MM/DD HH:MM:SS	2021/12/18 20:31:45
Chinese Date Format used to represent dates in the Chinese lunisolar calendar SS (Animal) (M'th month), D, YYYY	02 (Ox) (12'th month), 18, 2021
Excel date/time Used internally by Excel to enable easy calculations with dates and times Dates and times in Excel are stored as floating-point numbers	44548.855381944
Microsoft Timestamp / FileTime Used in Windows system APIs for file and directory timestamp handling 100-nanoseconds since Jan 1, 1601	132843331050000000
Text Date Textual representation of a date MMM DD, YYYY HH:MM:SS	Dec 18, 2021 20:31:45
Mac Timestamp Date and time format used in macOS Seconds since January 1, 2001	661552305
Mongo ObjectID Unique identifier format used in MongoDB 12-byte hexadecimal number	61be45310000000000000000
Julian Day Number Date format used in astronomy Number of days since January 1, 4713 BC	2459567.35538

What day of week 18/12/2021?

18 December 2021 is Saturday.

How long ago was 2021-12-18 20:31:45?

Current time is Saturday, February 8, 2025, 20:02:06

Years	3
Months	37
Weeks	163
Days	1147
Hours	27551
Minutes	1653090
Seconds	99185421

Pagination navigate

2021 Year

12 Month

18 Day

20 Hour (24)

31 Minute

45 Second

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