Try this
- Write two candidate times with both cities and the day of the week; check them in your device’s world clock.
- Mark which option can fit without skipping sleep, meals or an existing commitment. Offer those options as invitations, not reservations.
A worked example
“Would Tuesday at 7 p.m. your time work? That is Wednesday morning here. If neither option fits, we can exchange a note instead.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
Confirm the date as well as the hour. Recheck after travel or a clock change; a saved calendar entry is not proof the old arrangement still fits.