How to Automatically populate the mta.yaml version with time stamp

Hi Experts,

When I am building projects we are manually modifying the mta.yaml file with current date for promoting the stuff from Dev to QA. But I want to automatically populate the version as system date, can you please advise.

_schema-version: '2.0'

version: 2018.08.22 # Project Version = Creation Date

I want to populate the date automatically.