"Thu, 01 Jan 1970 00:02:21"

Convert date and time to unixtime.

141

Another datetime format string at UTC

YYYYMMDD
19700101

Only TIME
00:02:21

General datetime
1970-01-01 00:02:21Z

For Database
1970-01-01 00:02:21

For HTTP1.1
Thu, 01 Jan 1970 00:02:21 GMT