It is possible to format the look of a Datetime variable tweaking the VAR output.
By adding this in the editor:
Next service: $var:nasta_service:YY-MM-DD$ (YY-MM-DD)
The result will shown as:
Options you can use;
YY, YYYY = year
MM = month
DD = day
HH = hours
mm = minutes
Note: This is only possible with variables of the type Datetime