Day of the week and other day and week related functions in VBA

This page shows the code for commonly used date functions and code fragments which involve a days and weeks:

Day of the week

The Weekday function returns the daynumber while starting to count from the first day of the week that you specified. If not specified, vbSunday (=1) is assumed. So, in this case, if the returned value is 3 (=vbTuesday) it is Tuesday.

Dim dtDate As Date: dtDate = 
Dim iWeekday As Integer
iWeekday = Weekday(Date:=dtDate, FirstDayOfWeek:=vbSunday)

Name of WeekDay - WeekDayName

Returns localized WeekDay name. On Eglish systems returns Tuesday for the 3rd WeekDay. By setting Abbreviate:=True you will get the abbreviation, in this case Tue

Dim lngWeekDay As Long: lngWeekDay = 3
Dim strWeekDayName As String
strWeekDayName = WeekdayName(Weekday:=lngWeekDay, Abbreviate:=False, FirstDayOfWeek:=vbSunday)

Today

To get today's date, simply call the Date function

Dim dtToday As Date
dtToday = Date

Next day

The vba code fragment below calculates the next day from the date that was given as input. As an example with dt = #12/21/2019# will return 12/22/2019

Dim dtNextDay As Date
Dim dt As Date: dt = #12/21/2019#
dtNextDay = DateAdd("d", 1, dt)

Tomorrow

Tomorrow can simply be calculated by substituting the Date (=ToDay) function as the value for the date argument:

Dim dtTomorrow As Date
dtTomorrow = DateAdd(Interval:="d", Number:=1, Date:=Date)

Previous day

The vba code fragment below calculates the next day from the date that was given as input. As an example with dt = #12/21/2019# will return 12/22/2019

Dim dtNextDay As Date
Dim dt As Date: dt = #12/21/2019#
dtNextDay = DateAdd("d", 1, dt)

Yesterday

Yesterday can simply be calculated by substituting the Date (=ToDay) function as the value for the date argument:

Dim dtYesterday As Date
dtYesterday = DateAdd(Interval:="d", Number:=-1, Date:=Date)