"Thu, 01 Jan 1970 00:10:23"

Convert date and time to unixtime.

623

Another datetime format string at UTC

YYYYMMDD
19700101

Only TIME
00:10:23

General datetime
1970-01-01 00:10:23Z

For Database
1970-01-01 00:10:23

For HTTP1.1
Thu, 01 Jan 1970 00:10:23 GMT