"Thu, 01 Jan 1970 02:27:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
02:27:36
General datetime
1970-01-01 02:27:36Z
For Database
1970-01-01 02:27:36
For HTTP1.1
Thu, 01 Jan 1970 02:27:36 GMT