Days Are Not Detected

Hi, I used the following query to update my columns according to the change of time and days of the week. But my query is not working as it should. Today is Tuesday and the time now is 9am so according to my query Mon_Night column should be updated but Sat_Night column is being updated when i execute the query. Please advice..

declare @Weekday bit, @hour int

select @Weekday = datepart(dw,getdate()),@hour= datepart(hh,getdate())

Update Weekly set
Sat_Night=CASE WHEN (@Weekday= 1 and (@hour> 7 AND @hour<=19))

THEN ALD.EngTime ELSE NULL END,

Sun_Day=CASE WHEN (@Weekday= 1 and (@hour > 18 AND @hour < 7))

THEN ALD.EngTime ELSE NULL END,

Sun_Night=CASE WHEN (@Weekday= 2 and (@hour> 7 AND @hour<=19))

THEN ALD.EngTime ELSE NULL END,

Mon_Day=CASE WHEN (@Weekday= 2 and (@hour > 18 AND @hour < 7))

THEN ALD.EngTime ELSE NULL END,

Mon_Night=CASE WHEN (@Weekday= 3 and (@hour> 7 AND @hour<=19))

THEN ALD.EngTime ELSE NULL END,

Tue_Day=CASE WHEN (@Weekday= 3 and (@hour > 18 AND @hour < 7))

THEN ALD.EngTime ELSE NULL END,

Tue_Night=CASE WHEN (@Weekday= 4 and (@hour> 7 AND @hour<=19))

THEN ALD.EngTime ELSE NULL END,

Wed_Day=CASE WHEN (@Weekday= 4 and (@hour > 18 AND @hour < 7))

THEN ALD.EngTime ELSE NULL END,

Wed_Night=CASE WHEN (@Weekday= 5 and (@hour> 7 AND @hour<=19))

THEN ALD.EngTime ELSE NULL END,

Thu_Day=CASE WHEN (@Weekday= 5 and (@hour > 18 AND @hour < 7))

THEN ALD.EngTime ELSE NULL END,

Thu_Night=CASE WHEN (@Weekday= 6 and (@hour> 7 AND @hour<=19))

THEN ALD.EngTime ELSE NULL END,

Fri_Day=CASE WHEN (@Weekday= 6 and (@hour > 18 AND @hour < 7))

THEN ALD.EngTime ELSE NULL END,

Fri_Night=CASE WHEN (@Weekday= 7 and (@hour> 7 AND @hour<=19))

THEN ALD.EngTime ELSE NULL END,

Sat_Day=CASE WHEN (@Weekday= 7 and (@hour > 18 AND @hour < 7))

THEN ALD.EngTime ELSE NULL END
from ALD join Weekly on Weekly.TesterID = ALD.TesterID