I need to use timestamp because I'm using this value to order and filter events from the past and future.
Also another question, how can I have 09h00 instead of 09:00 for the hour?
I tried HH\hmm instead of HH:mm but it doesn't work.
You can try to use the format HH'h'mm but I see it doesn't work with the timestamp option. However, I recommend using the colon (:) instead of an alphabet character to be compatible with other options.
Alright I see, is it something that can be modified in a new Meta Box update though?
My initial question and having "h" instead of the ":" in the timeFormat?