Can hours of a single building be changed?

[Norm35]

I have a workplace that operates 7 days a week.

I would like the venues close to there to also operate 7 days a week.

I know I can change the operating hours for all the venues of a certain type building but can I single out specific buildings and change the operating hours for them without changing all other buildings of that type?

[MidrealmDM70]

Most venue buildings are already 7 days a week,
but only open from 9 AM until Midnight
(Full_Week & Whole_Day time periods)

You can't make the change in-game, but you can do what
you are asking by making a modded new building -

Copy and rename the building xml file
change the hours in the copied file
change the building ID in the copied file
Add the new building name in the object text file (under localizations)

So you could have
"Department Store" and "Extended Hours Dept. Store"

If you want to keep game balance, I would suggest increasing the building cost or lowering the benefits.

For more info on Modding Venues see:
http://www.tiltedmill.com/forums/showthread.php?t=24179
Modding Guide part 2 (shameless plug)