"Thu, 01 Jan 1970 07:39:46"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
07:39:46
General datetime
1970-01-01 07:39:46Z
For Database
1970-01-01 07:39:46
For HTTP1.1
Thu, 01 Jan 1970 07:39:46 GMT