Determining Holidays
When automating your home, it's often useful to know when the day is a holiday. This
article describes several ways you can do this.
If the holiday is the same date each year, it's easy. Simply use a "Date" condition in an If-Then statement. In the date condition, specify the month and date of the month. For example, to know if it's New Year's Day, check the boxes for the month "January" and the date "1". This condition will only be true when the date is the first and the month is January. This is how it would appear in your schedule:
If
Date is: (Dates= 1) (Months= Jan)
Then
;Do whatever you want
End If
Here are some of the holidays:
Holiday |
Date |
What if the date moves around each year? For example, Labor Day is the first Monday in September, and will occur on a different date each year. Here's how to handle this:
- Determine the range of dates it could fall on. In this case, the first Monday of
a month always falls on the first through seventh day of the month.
- Enter a date condition with the following items selected:
- All seven of the allowed dates (in this example, that's 1, 2, 3, 4, 5, 6, and 7).
- The day of the week (Monday).
- The month (September).
- All seven of the allowed dates (in this example, that's 1, 2, 3, 4, 5, 6, and 7).
This condition will only be true on a Monday in September where the date is the first through the seventh. Since this is the definition of Labor Day, it will be true every Labor Day, but never on any other day. This is how it would appear in your schedule:
If
Date is: (Days= M) (Dates= 1,2,3,4,5,6,7) (Months= Sep)
Then
;Do whatever you want
End If
This same method can be used for other holidays. The key is determining what
dates of the month the holiday can fall on. The following table shows some holidays that
move around each year:
Holiday |
When It Occurs |
Possible Dates |
Why isn't Easter listed? Well, Easter occurs on the first Sunday after a full moon on or after March 21. It can fall anywhere from March 22 to April 25. The only way to handle this is to get a calendar for the next several years and look up the dates. Then, enter separate If-Then statements for the actual date each year. To check the year, put the current year (its last two digits) into a variable, then check the value of the variable. For example, in 1996, Easter occurs on April 7. Here's how to enter the condition:
Var #1 (Year) = current year
If
Var #1 (Year) = 96
And Date is: (Dates= 7) (Months= April)
Then
;Do whatever you want
End If
There are a couple of different ways you can use these conditions in your HomeVision schedule:
 | Use the If-Then statement any time you need to know if it's a holiday. |
| Create a flag named "Today's a Holiday". Create a scheduled event that runs at 12:00 AM each day. In the event, check for all the holiday's you're interested in and set or clear the "Today's a Holiday" flag accordingly. One advantage of this approach is that all your conditions are in one place. If necessary, you could have multiple flags like "Christmas", "Thanksgiving", "Not a School Day", etc. |
