Two astronauts take from Earth at the same moment, one from Engand, one from New Zealand. They both fly to the moon and, landing next to each other, meet up to shake hands.
What time is it when they shake hands?
Lunar Standard Time: http://www.lunarclock.org/
Two Commanders take off from different stations in different systems.Both land at Dilworth Station in Orang at around the same time and meet in the station bar to discuss the local conflicts (and how best to turn them to their own avantage).
What time do they down their first Lavian brandy? Galactic/ED Time surely?