Unfortunately, MongoDB Date data type always has the time part. It is not like many SQL databases which offer e.g. Date and DateTime data types.

A common workaround is to store the date instead as a number data type, with format "YYYYMMDD".

With this, we can still easily query with comparison operators.

It is not uncommon that people also do this trick for SQL databases, even when a Date-only data type could have been used.