Flight plans across dates/Z times... - caution, tricky!
So, Mack is about to fly from Chiang Mai (UTC+7) to Da Nang (also UTC+7). So far so good.
He's looking to leave tomorrow, 19 July, at 0600 local time.
I think that is an ETD of 2300Z, and a DOF of 220719.
Someone else is telling me that it should be ETD2300Z, but DOF 220718 (ie aligned with the Z time). Sort of.
Answers on a postcard...