"Wed, 21 Jan 1970 07:50:29"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700121
Only TIME
07:50:29
General datetime
1970-01-21 07:50:29Z
For Database
1970-01-21 07:50:29
For HTTP1.1
Wed, 21 Jan 1970 07:50:29 GMT