Well, Toki was supposed to have a shift outside with the sign, and that timetable was showing 14-16 so it makes sense - it was the earliest time when Meguru was in the cafe and Toki wasn't. 10 minutes of wiggle room just so they don't meet at the door or something :P
That's pretty much how I see it. It's a bit confusing when Meguru says to come at 2.10 because we don't know at that moment that Toki's shift is a sign shift - but Meguru does know, and picks that time on purpose.
The best-laid plans of mice and men and yuri protagonists...
I believe this is not quite right.
The best-laid plans of mice and men sometimes work, sometimes fail.
The best-laid plans of yuri protagonists always go sideways, always, no exceptions. :/