"Thu, 15 Jan 1970 12:31:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
12:31:51
General datetime
1970-01-15 12:31:51Z
For Database
1970-01-15 12:31:51
For HTTP1.1
Thu, 15 Jan 1970 12:31:51 GMT