Setting SDTs for the weekend

To set SDTs for "The weekend", it's currently necessary to set three separate SDTs.  This is because it's not possible to set the number of hours AND it's not possible to set a 24-hour period.  So you have to set ones from:

• 00:00 Sat -> 00:59 Sat
• 00:59 Sat -> 00:59 Sun
• 00:59 Sun -> 00:00 Mon

This seems like a fairly basic requirement: "Set a weekend SDT".  Fix please?

While I'm ranting... what's with the AM/PM nonsense on time selectors?!  Anyone who's configuring LM will prefer the 24-hour clock.