"Thu, 01 Jan 1970 03:43:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
03:43:15
General datetime
1970-01-01 03:43:15Z
For Database
1970-01-01 03:43:15
For HTTP1.1
Thu, 01 Jan 1970 03:43:15 GMT