I recommend avoiding unnecessary string conversions/usage, and dependencies on language and/or other SQL settings.
Not sure what the h "N" means, but I still suggest this style of code instead:
WHERE DATEDIFF(DAY, 0, N) % 7 IN (5, 6)
SQL DBA,SQL Server MVP(07, 08, 09) "It's a dog-eat-dog world, and I'm wearing Milk-Bone underwear." "Norm", on "Cheers". Also from "Cheers", from "Carla": "You need to know 3 things about Tortelli men: Tortelli men draw women like flies; Tortelli men treat women like flies; Tortelli men's brains are in their flies".