Date-Time Plugin?

I realize that I can use scenes to create schedules. But this can create A LOT of scenes for certain things.

What I really want is a plug-in that the Combination Switch can read. So you could query the Date-Time Plugin to see if it’s within a time range AND if it’s within a date range.

Here’s how it will be used (PGE E6 schedule):

Peak Electrical Hours: (Almost triple the off peak rate)

[ul][li]Summer Time (May 1st - October 31st)
[list]
[li]Monday - Friday
1pm till 7pm.[/li]
[/list]
[/li][/ul]

Partial Peak Electrical Hours: (Slightly more per kWh)

[ul][li]Summer Time (May 1st - October 31st)
[list]
[li]Monday - Friday
10am till 9pm. (Intersects Peak Hours)[/li]
[li]Saturday - Sunday
5pm till 8pm.[/li]
[/list]
[/li][/ul]

[ul][li]Winter Time (November 1st - April 30st)
[list]
[li]Monday - Friday
5pm till 8pm.[/li]
[/list]
[/li][/ul]

I’m considering copying/modifying the Heliotrope plug-in to make this work.