Calculate number of days in a month
I'm trying to build a custom calendar in a sheet (Calendar app or view doesn't work in our use case), I want to calculate total number of days in a given month, but so far the day, date formulae need two set of dates. I know one way of simply declaring the values in a column and use it that way but I was wondering if anyone had this issue and if they've solved it?
Best Answer
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Ameya Athalye ✭✭✭✭✭
@MCorbinThank you, this is really helpful. I'd started down the same path, so it's good to know I'm on the right track. The screenshot you shared is very useful. Thank you.
Answers
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MCorbin Overachievers Alumni
There isn't a formula that will automatically give you the last day of the month, which would help in the calculation.
I have a support table where I keep a bunch of date related values that I use as lookups in sheets to help with things like this:
For your formula.... I would first lookup the last day of the month using an Index/Match formula
So, if you have a column with your month start date in it:
You can create a formula to find the month end: =DATE(YEAR([Month Start]@row), MONTH([Month Start]@row), INDEX({Last Day}, MATCH(MONTH([Month Start]@row), {Month Number}, 0)))
Then the # of days in the month is a simple: =[Month End]@row - [Month Start]@row
If your date column has any date in the month, but you still want to calculate how many days are in that month, you could create a little more complicated formula for # Days:
=DATE(YEAR(Date@row), MONTH(Date@row), INDEX({Last Day}, MATCH(MONTH(Date@row), {Month Number}, 0))) - DATE(YEAR(Date@row), MONTH(Date@row), 1)
(this one takes the month and year from your date column, but inserts a 1 for the start date to always give you the 1st of the month, and does the lookup to get the last date of the month)
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Ameya Athalye ✭✭✭✭✭
@MCorbinThank you, this is really helpful. I'd started down the same path, so it's good to know I'm on the right track. The screenshot you shared is very useful. Thank you.
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Ameya Athalye ✭✭✭✭✭
@MCorbinI was able to build a custom calendar. Thanks for your help.
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Instead of applying the formula to \"Multiselect Text String\" row, did you tried with \"Multiselect Values\" row?<\/p>
=IF(HAS([Multiselect Values]@row, [Component ID]@row), \"MATCH\", \"NO MATCH\")<\/p>
Thank you,<\/p>"}]}},"status":{"statusID":3,"name":"Accepted","state":"closed","recordType":"discussion","recordSubType":"question"},"bookmarked":false,"unread":false,"category":{"categoryID":322,"name":"Formulas and Functions","url":"https:\/\/community.smartsheet.com\/categories\/formulas-and-functions","allowedDiscussionTypes":[]},"reactions":[{"tagID":3,"urlcode":"Promote","name":"Promote","class":"Positive","hasReacted":false,"reactionValue":5,"count":0},{"tagID":5,"urlcode":"Insightful","name":"Insightful","class":"Positive","hasReacted":false,"reactionValue":1,"count":0},{"tagID":11,"urlcode":"Up","name":"Vote Up","class":"Positive","hasReacted":false,"reactionValue":1,"count":0},{"tagID":13,"urlcode":"Awesome","name":"Awesome","class":"Positive","hasReacted":false,"reactionValue":1,"count":0}],"tags":[]},{"discussionID":109493,"type":"question","name":"I am having trouble using \"And\", \"OR\" & \"Countif(s)\" to build a formula.","excerpt":"Hello, I am attempting to come up with a sheet summary formula that counts cells if they meet at least one of 3 different statuses in the same column, AND also meet one of 5 different statuses in a separate column. So using the screenshot I've provided as an example (although it doesn't have 5 different statuses in the…","snippet":"Hello, I am attempting to come up with a sheet summary formula that counts cells if they meet at least one of 3 different statuses in the same column, AND also meet one of 5…","categoryID":322,"dateInserted":"2023-08-25T20:03:21+00:00","dateUpdated":null,"dateLastComment":"2023-08-26T00:34:49+00:00","insertUserID":165710,"insertUser":{"userID":165710,"name":"SmarsheetNewb","url":"https:\/\/community.smartsheet.com\/profile\/SmarsheetNewb","photoUrl":"https:\/\/us.v-cdn.net\/6031209\/uploads\/defaultavatar\/nWRMFRX6I99I6.jpg","dateLastActive":"2023-08-26T00:33:27+00:00","banned":0,"punished":0,"private":false,"label":"✭"},"updateUserID":null,"lastUserID":161714,"lastUser":{"userID":161714,"name":"Carson Penticuff","url":"https:\/\/community.smartsheet.com\/profile\/Carson%20Penticuff","photoUrl":"https:\/\/us.v-cdn.net\/6031209\/uploads\/userpics\/B0Q390EZX8XK\/nBGT0U1689CN6.jpg","dateLastActive":"2023-08-27T02:16:35+00:00","banned":0,"punished":0,"private":false,"label":"✭✭✭✭✭✭"},"pinned":false,"pinLocation":null,"closed":false,"sink":false,"countComments":3,"countViews":26,"score":null,"hot":3386005690,"url":"https:\/\/community.smartsheet.com\/discussion\/109493\/i-am-having-trouble-using-and-or-countif-s-to-build-a-formula","canonicalUrl":"https:\/\/community.smartsheet.com\/discussion\/109493\/i-am-having-trouble-using-and-or-countif-s-to-build-a-formula","format":"Rich","tagIDs":[254],"lastPost":{"discussionID":109493,"commentID":392692,"name":"Re: I am having trouble using \"And\", \"OR\" & \"Countif(s)\" to build a formula.","url":"https:\/\/community.smartsheet.com\/discussion\/comment\/392692#Comment_392692","dateInserted":"2023-08-26T00:34:49+00:00","insertUserID":161714,"insertUser":{"userID":161714,"name":"Carson Penticuff","url":"https:\/\/community.smartsheet.com\/profile\/Carson%20Penticuff","photoUrl":"https:\/\/us.v-cdn.net\/6031209\/uploads\/userpics\/B0Q390EZX8XK\/nBGT0U1689CN6.jpg","dateLastActive":"2023-08-27T02:16:35+00:00","banned":0,"punished":0,"private":false,"label":"✭✭✭✭✭✭"}},"breadcrumbs":[{"name":"Home","url":"https:\/\/community.smartsheet.com\/"},{"name":"Get Help","url":"https:\/\/community.smartsheet.com\/categories\/get-help"},{"name":"Formulas and Functions","url":"https:\/\/community.smartsheet.com\/categories\/formulas-and-functions"}],"groupID":null,"statusID":3,"attributes":{"question":{"status":"accepted","dateAccepted":"2023-08-26T00:33:25+00:00","dateAnswered":"2023-08-25T20:44:12+00:00","acceptedAnswers":[{"commentID":392662,"body":"
Try this:<\/p>
=COUNTIFS([Item Number]:[Item Number], OR(@cell = \"C001\", @cell = \"COO2\", @cell = \"COO3\", @cell = \"COO4\"), [Status]:[Status], OR(@cell = \"Green\", @cell = \"Yellow\", @cell = \"Red\"))<\/p>"}]}},"status":{"statusID":3,"name":"Accepted","state":"closed","recordType":"discussion","recordSubType":"question"},"bookmarked":false,"unread":false,"category":{"categoryID":322,"name":"Formulas and Functions","url":"https:\/\/community.smartsheet.com\/categories\/formulas-and-functions","allowedDiscussionTypes":[]},"reactions":[{"tagID":3,"urlcode":"Promote","name":"Promote","class":"Positive","hasReacted":false,"reactionValue":5,"count":0},{"tagID":5,"urlcode":"Insightful","name":"Insightful","class":"Positive","hasReacted":false,"reactionValue":1,"count":0},{"tagID":11,"urlcode":"Up","name":"Vote Up","class":"Positive","hasReacted":false,"reactionValue":1,"count":0},{"tagID":13,"urlcode":"Awesome","name":"Awesome","class":"Positive","hasReacted":false,"reactionValue":1,"count":0}],"tags":[{"tagID":254,"urlcode":"formulas","name":"Formulas"}]},{"discussionID":109474,"type":"question","name":"Help with date calculation formula","excerpt":"Hello, I'm trying to find a formula that will help me calculate how long an intake took to resolve. The rows I need to be calculated are Date Reported & Resolution Date. If the resolution date is blank I want it to use the current date in the calculation to see how long this issue has gone unresolved. Any help is much…","snippet":"Hello, I'm trying to find a formula that will help me calculate how long an intake took to resolve. The rows I need to be calculated are Date Reported & Resolution Date. If the…","categoryID":322,"dateInserted":"2023-08-25T16:29:39+00:00","dateUpdated":"2023-08-25T16:29:59+00:00","dateLastComment":"2023-08-25T23:01:30+00:00","insertUserID":165688,"insertUser":{"userID":165688,"name":"Nwest","title":"Systems Analyst","url":"https:\/\/community.smartsheet.com\/profile\/Nwest","photoUrl":"https:\/\/aws.smartsheet.com\/storageProxy\/image\/images\/u!1!ukHVZ18ImX4!BcjWAe8S9SY!l7iQo_PZHOx","dateLastActive":"2023-08-25T17:22:30+00:00","banned":0,"punished":0,"private":false,"label":"✭"},"updateUserID":165688,"lastUserID":8888,"lastUser":{"userID":8888,"name":"Andrée Starå","title":"Smartsheet Expert Consultant & Partner | Workflow Consultant \/ CEO @ WORK BOLD","url":"https:\/\/community.smartsheet.com\/profile\/Andr%C3%A9e%20Star%C3%A5","photoUrl":"https:\/\/us.v-cdn.net\/6031209\/uploads\/userpics\/0PAU3GBYQLBT\/nXWM7QXGD6464.jpg","dateLastActive":"2023-08-26T17:06:33+00:00","banned":0,"punished":0,"private":false,"label":"✭✭✭✭✭✭"},"pinned":false,"pinLocation":null,"closed":false,"sink":false,"countComments":3,"countViews":25,"score":null,"hot":3385987269,"url":"https:\/\/community.smartsheet.com\/discussion\/109474\/help-with-date-calculation-formula","canonicalUrl":"https:\/\/community.smartsheet.com\/discussion\/109474\/help-with-date-calculation-formula","format":"Rich","tagIDs":[254],"lastPost":{"discussionID":109474,"commentID":392687,"name":"Re: Help with date calculation formula","url":"https:\/\/community.smartsheet.com\/discussion\/comment\/392687#Comment_392687","dateInserted":"2023-08-25T23:01:30+00:00","insertUserID":8888,"insertUser":{"userID":8888,"name":"Andrée Starå","title":"Smartsheet Expert Consultant & Partner | Workflow Consultant \/ CEO @ WORK BOLD","url":"https:\/\/community.smartsheet.com\/profile\/Andr%C3%A9e%20Star%C3%A5","photoUrl":"https:\/\/us.v-cdn.net\/6031209\/uploads\/userpics\/0PAU3GBYQLBT\/nXWM7QXGD6464.jpg","dateLastActive":"2023-08-26T17:06:33+00:00","banned":0,"punished":0,"private":false,"label":"✭✭✭✭✭✭"}},"breadcrumbs":[{"name":"Home","url":"https:\/\/community.smartsheet.com\/"},{"name":"Get Help","url":"https:\/\/community.smartsheet.com\/categories\/get-help"},{"name":"Formulas and Functions","url":"https:\/\/community.smartsheet.com\/categories\/formulas-and-functions"}],"groupID":null,"statusID":3,"attributes":{"question":{"status":"accepted","dateAccepted":"2023-08-25T17:04:22+00:00","dateAnswered":"2023-08-25T16:36:59+00:00","acceptedAnswers":[{"commentID":392622,"body":"