Spoken time and date storage issue

New to coding and Voiceflow!

My intention is to get the date (spoken as “15th of March”/" 12March"/“today” etc) as input from the user and then that input translated to a time format and stored to {Var}. When that {Var} triggered then there is an Alexa response.
A link to How To would be appreciated

There are no "how to"s what you expect directly. But for capture date, you should use “Date” type slot. which is built-in slot type and any date expression will be in “YYYY-MM-DD”.

Here is a sample.