"Thu, 01 Jan 1970 05:55:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
05:55:38
General datetime
1970-01-01 05:55:38Z
For Database
1970-01-01 05:55:38
For HTTP1.1
Thu, 01 Jan 1970 05:55:38 GMT