#VBA WEEK NUMBER CODE#
#VBA WEEK NUMBER ISO#
#VBA WEEK NUMBER SERIES#

It will default to Thursday and, since we are using the ISO weeknumber system, should always fall within the current year. It has two arguments, the 1 st is required and the 2 nd is optional: WEEKNUM (serialnumber, returntype) Serialnumber - any date within the week whose number you are trying to find. DOW is an optional argument representing the day of the week. The WEEKNUM function is used in Excel to return the week number of a specific date in the year (a number between 1 and 54).Typically the trays are changed every few weeks and the number of trays varies based on your needs.

#VBA WEEK NUMBER SERIES#

In this treatment plan, a series of trays are made to ensure the teeth re-align properly.

Credits to these guys: Solution 3Īs an additional option, for those using the ISO weeknumber system, where Week 1 of the year is the first week of the year containing four days (or the week that includes the first Thursday of the calendar year, and the first day of the week is Sunday. It is important that an orthodontist is involved in your treatment as they will establish a treatment plan. You have to pass which day do you want as third parameter. WEEKNUM (serialnumber, returntype) The WEEKNUM function syntax has the following arguments: Serialnumber Required. It works quite ok, taking in mind that the first day of the week is Sunday: Function fnDateFromWeek(ByVal iYear As Integer, ByVal iWeek As Integer, ByVal iWeekDday As Integer)įnDateFromWeek = DateSerial(iYear, 1, ((iWeek - 1) * 7) + iWeekDday - Weekday(DateSerial(iYear, 1, 1)) + 1) GetDayFromWeekNumber = DateAdd('ww', WeekNumber - 1, DateSerial(InYear, 1, i)) 'Function will return if you don't use a good DayInWeek1Monday7Sundayĭo While Weekday(DateSerial(InYear, 1, i), vbMonday) DayInWeek1Monday7Sunday 'DayInWeek1Monday7Sunday!', vbOKOnly + vbCritical MsgBox 'Please input between 1 and 7 for the argument :' & vbCrLf & _ Optional DayInWeek1Monday7Sunday As Integer = 1) As Date Or use the below function GetDayFromWeekNumberĭebug.Print Format(GetDayFromWeekNumber(2017, 1, 4), 'ddd d MMM yyyy')Īnd the generic function GetDayFromWeekNumber : Public Function GetDayFromWeekNumber(InYear As Integer, _ If others are looking into this and don't want a Thursday or don't work on 2017 : I am answering it because i couldn't find a suitable answer for: Input month and year and return all week numbers for this month.For a specific year, you can do it like this : DateAdd('ww', WeekNumber - 1, DateSerial(2017, 1, 5))Īnd to test it : Debug.Print Format(DateAdd('ww', WeekNumber - 1, DateSerial(YearNumber, 1, 5)), 'ddd d MMM yy') On future requests, post what you have tried. It works quite ok, taking in mind that the first day of the week is Sunday: Function fnDateFromWeek ( ByVal iYear As Integer, ByVal iWeek As Integer, ByVal iWeekDday As Integer ) fnDateFromWeek DateSerial (iYear, 1, ( (iWeek - 1) 7) + iWeekDday - Weekday (DateSerial (iYear, 1, 1 )) + 1 ) End Function.

• Then create the collection arr(i) to output the unique values from the array MyArray Given a week Number, how do I calculate the date that for the Monday of that week Oct 9 08 1 SubscribePost Reply 4 10544 Tom van Stiphout On Thu, 00:53:32 -0700 (PDT), Vince <> wrote: Use the DatePart function with 'w' to get the weekday of the given date.

DATE (B5, 1, -2) WEEKDAY (DATE (B5, 1, 3)): It returns the last Monday of the previous year. Loop on each day of the month with MonthYearDay and populate the array MyArray with the week of that day (MonthYearDay). After changing the format, perform these.

#VBA WEEK NUMBER CODE#

The code first get all the days on a month with intDaysInMonth, so on February of 2017 it will output 28.

MonthYearDay = DateSerial(Year(InputDate), Month(InputDate), i) IntDaysInMonth = Day(DateSerial(Year(MonthYear), Month(MonthYear) + 1, 0)) MonthYear = Month(InputDate) & '/' & Year(InputDate) Custom function will have day, month, year and week number as input parameters. In this article, raw data consists of week number, day, month and year. Returns a Variant (Integer) containing the specified part of a given date. We will create a custom function which will return the first date of the week after specified number of week from the given year, month or date. My Friend Google came up with a date functions that I use to determine the week number based on picking a starting date. Sunday Jan 4 is the first day of 'Week 4', and so on. For more information and a workaround, see Format or DatePart functions can return wrong week number for last Monday in Year. The example in the picture above shows that Jan 1 - 3, 2015 are days in week 3. The last Monday in some calendar years can be returned as week 53 when it should be week 1. Code Sub WeeksInMonth()ĭim InputDate As Date, MonthYearDay As Dateĭim i As Long, intDaysInMonth As Long, j As Long There is an issue with the use of this function. Input month and year and return all week numbers for this month. InputDate = Now 'Change to desired date/cell Input a date and get the week number for this date.

Vba week number