How do I determine a public holiday in Sql server?

Question

I have an application written in c# that cannot run on a public holiday or a weekend. I\'ve looked around a bit and haven\'t found anywhere (official) that provides all the

Answer 1

Let's simplify this:

---

case

-- New Year's Day
when DATEPART(MM, @DATE) = 1
    and DATEPART(DD, @DATE) = 1
    and DATEPART(DW, @DATE) in (2,3,4,5,6) then 'Y'
when DATEPART(MM, @DATE) = 12
    and DATEPART(DD, @DATE) = 31
    and DATEPART(DW, @DATE) = 6 then 'Y'
when DATEPART(MM, @DATE) = 1
    and DATEPART(DD, @DATE) = 2
    and DATEPART(DW, @DATE) = 2 then 'Y'

-- Memorial Day (last Monday in May)
when DATEPART(MM, @DATE) = 5
    and DATEPART(DD, @DATE) between 25 and 31
    and DATEPART(DW, @DATE) = 2 then 'Y'

-- Independence Day
when DATEPART(MM, @DATE) = 7
    and DATEPART(DD, @DATE) = 4
    and DATEPART(DW, @DATE) in (2,3,4,5,6) then 'Y'
when DATEPART(MM, @DATE) = 7
    and DATEPART(DD, @DATE) = 3
    and DATEPART(DW, @DATE) = 6 then 'Y'
when DATEPART(MM, @DATE) = 7
    and DATEPART(DD, @DATE) = 5
    and DATEPART(DW, @DATE) = 2 then 'Y'

-- Labor Day (first Monday in September)
when DATEPART(MM, @DATE) = 9
    and DATEPART(DD, @DATE) between 1 and 7
    and DATEPART(DW, @DATE) = 2 then 'Y'

-- Thanksgiving Day (fourth Thursday in November)
when DATEPART(MM, @DATE) = 11
    and DATEPART(DD, @DATE) between 22 and 28
    and DATEPART(DW, @DATE) = 5 then 'Y'

-- Black Friday (day after Thanksgiving)
when DATEPART(MM, @DATE) = 11
    and DATEPART(DD, @DATE) between 23 and 29
    and DATEPART(DW, @DATE) = 6 then 'Y'

-- Christmas Day
when DATEPART(MM, @DATE) = 12
    and DATEPART(DD, @DATE) = 25
    and DATEPART(DW, @DATE) in (2,3,4,5,6) then 'Y'
when DATEPART(MM, @DATE) = 12
    and DATEPART(DD, @DATE) = 24
    and DATEPART(DW, @DATE) = 6 then 'Y'
when DATEPART(MM, @DATE) = 12
    and DATEPART(DD, @DATE) = 26
    and DATEPART(DW, @DATE) = 2 then 'Y'

else 'N' end