"Thu, 01 Jan 1970 09:22:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
09:22:21
General datetime
1970-01-01 09:22:21Z
For Database
1970-01-01 09:22:21
For HTTP1.1
Thu, 01 Jan 1970 09:22:21 GMT