Built-in Constants

VBA.vbDateTimeFormat

vbGeneralDate (0) 
vbLongDate (1) 
vbShortDate (2) 
vbLongTime (3) 
vbShortTime (4) 

VBA.vbDayOfWeek

vbSunday (1) 
vbMonday (2) 
vbTuesday (3) 
vbWednesday (4) 
vbThursday (5) 
vbFriday (6) 
vbSaturday (7) 

VBA.vbFirstWeekOfYear

vbUseSystem (0) 
vbFirstJan1 (1) 
vbFirstFourDays (2) 
vbFirstFullWeek (3)