Data.

1999-01-21T22:59:59.999731779Z

Date and time

Components

Year	1999
Month	1
Day	21
Hour	22
Minute	59
Second (integer part)	59
Second (fraction part)	0.999731779
Time zone offset	+00:00

Day (1999-01-21)

Notes

Calendars

Proleptic Gregorian calendar	AD	1999-01-21
	Japan	平成11年1月21日
	Ryuukyuu	平成11年1月21日
Proleptic Julian calendar	AD	1999-01-08
	Japan	平成11年1月8日
	Ryuukyuu	平成11年1月8日
旧暦Kyuureki (Japan)	AD	1998年12月4日
	Japan (北朝)	平成10年12月4日
	Japan (南朝)	平成10年12月4日
旧暦Kyuureki (Ryuukyuu)	AD	1998年12月4日
旧暦Kyuureki (Ryuukyuu)	Ryuukyuu	平成10年12月4日

Holidays

Japan	Normal day

Properties

Yearless date	--01-21
Day of week (number)	4
Day of week (English)	Thursday
Day of week (日本語)	木曜日
Kanshi	癸酉 (9₀, 10₁)
六曜 (Japan)	先負

Cast

Unix number	916959599.999732
Unix integer	916959599
HTML number	916959599999.732
HTML month number	348
Julian Day	2451200.45833333
Julian Day (integer of day)	2451200
Modified Julian Day	51199.9583333302
Rata Die	729775.95833333

Serializations

Global date and time string (time zone offset preserved)	1999-01-21T22:59:59.999731779Z
Global date and time string (UTC)	1999-01-21T22:59:59.999731779Z
Normalized forced-UTC global date and time string	1999-01-21T22:59:59.999731779Z
HTTP date	`Thu, 21 Jan 1999 22:59:59 GMT`
RSS2 date-time	`Thu, 21 Jan 1999 22:59:59 +0000`
`document.lastModified` format	`01/21/1999 22:59:59`
Local date and time string	1999-01-21T22:59:59.999731779
Normalized local date and time string	1999-01-21T22:59:59.999731779
Date string	1999-01-21
Date string with optional time	1999-01-21T22:59:59.999731779Z
Year string	1999
Month string	1999-01
Yearless date string	--01-21
Week string	1999-W03
Time string	22:59:59.999731779
Shortest time string	22:59:59.999731779

Your browser

`toString`
`toISOString`
`toDateString`
`toTimeString`
`toGMTString`
`toUTCString`
`toJSON`

`toLocaleString`	undefined
	`en`
	`en-US`
	`en-GB`
	`fr`
	`fr-CA`
	`es`
	`es-US`
	`it`
	`de`
	`ja`
	`ja-JP`
	`ja-JP-u-ca-japanese`
	`zh`
	`zh-CN`
	`zh-TW`
	`zh-HK`
	`zh-MO`
	`zh-SG`
	`zh-Hant`
	`zh-Hani`
	`zh-u-ca-chinese`
	`zh-TW-u-ca-roc`
	`ko`
	`th`
	`th-u-ca-buddhist-nu-thai`
	`th-u-nu-arab`
	`ar-EG`
	`ar-SA`
	`ar-SA-u-ca-islamic-nu-latn`
`toLocaleDateString`	undefined
`toLocaleTimeString`	undefined

Links

	Previous	Next
365 days	1998-01-21T22:59:59.999731779Z	2000-01-21T22:59:59.999731779Z
30 days	1998-12-22T22:59:59.999731779Z	1999-02-20T22:59:59.999731779Z
7 days	1999-01-14T22:59:59.999731779Z	1999-01-28T22:59:59.999731779Z
Day	1999-01-20T22:59:59.999731779Z	1999-01-22T22:59:59.999731779Z
Hour	1999-01-21T21:59:59.999731779Z	1999-01-21T23:59:59.999731779Z
Minute	1999-01-21T22:58:59.999731779Z	1999-01-21T23:00:59.999731779Z