Char	Description	Examples
c	ISO 8601 date	2023-01-18T14:12:02+00:00
r	RFC 2822 formatted date	Wed, 18 Jan 2023 14:12:02 +0000
U	Seconds since 1970-01-01 00:00:00 GMT	1674051122
B	Swatch Internet time	633
I	1 if the server is on Daylight Saving Time, 0 otherwise.	0