I had a work call at 2am this morning.
I do not (anymore) generally take calls at 2am. Unlike my last place of employment, in this first six months on the job, I have done better at setting boundaries. I have turned down multiple 2-3-and-4am meeting invitations, simply stating "this is well before my working hours. Please send me the notes or we can reschedule."
However, there was a particular exception for this meeting, and I took it. I do not plan to make this a habit.