Creating a datetime for a specific date use

DateTime.Parse('2020-01-01')

or

DateTime.Create(2020, 1, 1)

Empty DateTime that is not nullable

A DateTime that is not nullable, i.e. a DateTime not a DateTime? without a date, what value does it have?

You can create a value using, which will be a empty

DateTime.Create(1, 1, 1)

You can also compare an empty DateTime value with this empty DateTime value like this;

vDateTimeValue = DateTime.Create(1, 1, 1) 

Will return true for an empty but not nullable DateTime variable