>>>>Something that's nagging me: What's the difference between 'Get all messages for today' and 'Get all messages since yesterday' ?
>>>
>>>I'm betting it's a language thing, English not being Michel's first language. I notice that a lot French-speaking people get the meaning of the word "since" mixed up.
>>>
>>>~~Bonnie
>>
>>You might have a good point there, Bonnie. A francophone might say "I've lived here since [for] seven years". So the button might mean "get all messages for yesterday" (ie all yesterday's messages).
>
>I use From-Thru rather than From-Till in my apps if the second date/datetime is inclusive. For example, if a report should span yesterday and today then the Thru day is today while Till would produce a report without today. Is this correct usage of English?

In the UK we'd say "I work Monday to Friday" whereas in the US they say, I believe, "Monday through Friday".

"till" or "until" implies a time deadline, as in "I work till 5 pm, Monday to Friday", so a time/date at which the action is finished, so not so intuitively inclusive.