Data.

1217-09-28T22:59:59.999698639Z

Date and time

Components

Year	1217
Month	9
Day	28
Hour	22
Minute	59
Second (integer part)	59
Second (fraction part)	0.999698639
Time zone offset	+00:00

Day (1217-09-28)

Notes

Calendars

Proleptic Gregorian calendar	AD	1217-09-28
	Japan	建保5年9月28日
	Ryuukyuu	嘉定10年9月28日
Proleptic Julian calendar	AD	1217-09-21
	Japan	建保5年9月21日
	Ryuukyuu	嘉定10年9月21日
旧暦Kyuureki (Japan)	AD	1217年8月19日
	Japan (北朝)	建保5年8月19日
	Japan (南朝)	建保5年8月19日
旧暦Kyuureki (Ryuukyuu)	AD	1217年8月19日
旧暦Kyuureki (Ryuukyuu)	Ryuukyuu	嘉定10年8月19日

Holidays

Japan	Normal day

Properties

Yearless date	--09-28
Day of week (number)	4
Day of week (English)	Thursday
Day of week (日本語)	木曜日
Kanshi	甲子 (0₀, 1₁)
六曜 (Japan)	友引

Cast

Unix number	-23738922000.0003
Unix integer	-23738922001
HTML number	-23738922000000.3
HTML month number	-9028
Julian Day	2165831.45833333
Julian Day (integer of day)	2165831
Modified Julian Day	-234169.04166667
Rata Die	444406.95833333

Serializations

Global date and time string (time zone offset preserved)	1217-09-28T22:59:59.999698639Z
Global date and time string (UTC)	1217-09-28T22:59:59.999698639Z
Normalized forced-UTC global date and time string	1217-09-28T22:59:59.999698639Z
HTTP date	`Thu, 28 Sep 1217 22:59:59 GMT`
RSS2 date-time	`Thu, 28 Sep 1217 22:59:59 +0000`
`document.lastModified` format	`09/28/1217 22:59:59`
Local date and time string	1217-09-28T22:59:59.999698639
Normalized local date and time string	1217-09-28T22:59:59.999698639
Date string	1217-09-28
Date string with optional time	1217-09-28T22:59:59.999698639Z
Year string	1217
Month string	1217-09
Yearless date string	--09-28
Week string	1217-W39
Time string	22:59:59.999698639
Shortest time string	22:59:59.999698639

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

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365 days	1216-09-28T22:59:59.999698639Z	1218-09-28T22:59:59.999698639Z
30 days	1217-08-29T22:59:59.999698639Z	1217-10-28T22:59:59.999698639Z
7 days	1217-09-21T22:59:59.999698639Z	1217-10-05T22:59:59.999698639Z
Day	1217-09-27T22:59:59.999698639Z	1217-09-29T22:59:59.999698639Z
Hour	1217-09-28T21:59:59.999698639Z	1217-09-28T23:59:59.999698639Z
Minute	1217-09-28T22:58:59.999698639Z	1217-09-28T23:00:59.999698639Z