"Thu, 01 Jan 1970 07:55:54"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
07:55:54
General datetime
1970-01-01 07:55:54Z
For Database
1970-01-01 07:55:54
For HTTP1.1
Thu, 01 Jan 1970 07:55:54 GMT