"Thu, 01 Jan 1970 07:38:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
07:38:36
General datetime
1970-01-01 07:38:36Z
For Database
1970-01-01 07:38:36
For HTTP1.1
Thu, 01 Jan 1970 07:38:36 GMT