[hurtuvac78]

Nitpick of mine: timezones.

I work in a different timezone than where I live, so my laptop is set to a different time for convenience.

Half the time, the delivery time is adapted to my computer clock, half the time, to the local time.

Ok ok I know, I brought that to myself... but what's nice is to clarify which time zone you use when you give a time.

[takinola]

Timezones are the bane of programmers' existences. It also can quickly become a UX nightmare as you have found out.

My rule of thumb is that the time should always be displayed in the user's timezone especially if their location is specified ie if a parcel is being delivered to location X, the delivery time should be displayed for the timezone of location X (and the UX should specify the timezone for additional clarity).