6/7/2023 0 Comments Excel week number formulaISO week numbers, start on the Monday of the first week in a year with a Thursday. This means that the first day of the year for ISO weeks is always a Monday in the period between Jan 29 and Jan 4. With a return_type of 2, week 1 begins on January 1, and week 2 begins on the next Monday. See the WEEKNUM page for more information. WEEKNUM takes two arguments: a date, and (optionally) return_type, which controls the scheme used to calculate the week number.īy default, the WEEKNUM function uses a scheme where week 1 begins on January 1, and week 2 begins on the next Sunday (when the return_type argument is omitted, or supplied as 1). The WEEKNUM function starts counting with the week that contains January 1. So with the same day using the 2 functions WEEKNUM and WEEKDAY will determine what day that day is in the week and how many days it is in the year.Ībove is a comparison between the similarities and differences between 2 functions WEEKNUM and WEEKDAY hope to help you.The WEEKNUM function takes a date and returns a week number (1-54) that corresponds to the week of year. In the cell to calculate enter the formula: = WEEKNUM (D6, D7). Calculated on how many days of the year is in the year. Press Enter -> result on is the 4th day of the week. In the cell to calculate enter the formula: = WEEKDAY (D6, D7). For example:Ĭalculates the date and what day is in the week of the year. Thus, the number of parameters of the two functions are the same but different in the parameters and return values. + return_type = 21 -> week starts on Monday and value = 2. + return_type = 17 -> week starting on Sunday and value = 1. + return_type = 16 -> week starts on Saturday and value = 1. + return_type = 15 -> week starts on Friday and value = 1. + return_type = 14 -> week starts on Thursday and value = 1. + return_type = 13 -> week starts on the 4th and value = 1. + return_type = 12 -> week starting on the 3rd and value = 1. + return_type = 11 -> week starting on Monday and value = 1. + return_type = 2 -> week starts on Monday and value = 1. + return_type = 1 or skip -> the week starts on Sunday and the value = 1. return_type : A number to determine the week starting from, the default value is 1 with the following values: serial_number : A day of the week, is a required parameter. + return_type = 17 : A number from 1 (Sunday) to 7 (Saturday). + return_type = 16 : A number from 1 (Saturday) to 7 (Friday). + return_type = 15 : The number from 1 (Friday) to 7 (Thursday). + return_type = 14 : A number from 1 (Thursday) to 7 (Wednesday). + return_type = 13 : The number from 1 (Wednesday) to 7 (Tuesday). + return_type = 12 : The number from 1 (Tuesday) to 7 (Monday). + return_type = 11 : Number from 1 (Monday) to 7 (Sunday). + return_type = 3 : A number from 1 (Monday) to 7 (Sunday). + return_type = 2 : The number from 1 (Monday) to 7 (Sunday). + return_type = 1 or skip : Value from 1 (Sunday) to 7 (Saturday). return_type : is a number used to determine the type of return value, is an optional parameter, the default is 1, with the following values: serial_number : is a sequence number representing the date to determine the day of the week, is a required parameter. * The WEEKNUM function is greater than the value of the WEEKDAY function corresponding to the total number of weeks in the year. + WEEKNUM function shows the ordinal number of the week of the year. + WEEKDAY function shows the number of the day of the week. Same: Both functions return sequence numbers. The following article helps you clearly distinguish the meaning and usage between 2 functions WEEKDAY and WEEKNUM in Excel.
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