Under EASA rules instrument time doesn't matter, except during initial training and to get a rating. Thereafter, only time spent under instrument flight rules matter, that has to be logged, instrument time doesn't. It can be logged if one wishes to do so, in the remarks column. Under operational conditions in the EASA flight log, column 9, one has to log night and/or IFR time.
AMC1 FCL.050 (a) (5) Operational conditions, namely if the operation takes place at night, or is conducted under instrument flight rules.
AMC1 FCL.050 (i) (7) column 9: enter flight time undertaken at night or under instrument flight rules if applicable.