"Thu, 01 Jan 1970 03:03:52"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
03:03:52
General datetime
1970-01-01 03:03:52Z
For Database
1970-01-01 03:03:52
For HTTP1.1
Thu, 01 Jan 1970 03:03:52 GMT