every page of handbook should show the date (at least) in the header

[jeisner]

Individual entries in the handbook show times, but they do not show dates or session numbers.
So if you open the handbook to some page in the middle -- randomly or by searching for text -- then you can't see what day it is.

For example, I was trying to find out when I was presenting, but after searching for my entry, I had to scroll back like 10 pages to find the date, and had to worry that I might have scrolled too far and actually found the previous date ...

For easy reference, every page should show the date of its first entry -- maybe also the session number and/or time -- in large type in the header. This is also useful when trying to flip to the current time slot in order to find out what sessions are available and what papers are in them.