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I have row values as dates in one object, i.e dates within a given year. I have a second object with field names as Day1__c, Day2__c and so on till Day366__c. I want to assign the dates to the fields in the 2nd object.

Example, if the date in the first object is 2018-01-01 I want to assign a value to field Day1__c in the second object and if the date is 2018-12-31 I want to assign a value to Day365__c.

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I hope the dayOfYear() method of Date class can help you to achieve this requirement.

As per Salesforce it "Returns the day-of-year component of a Date." First, you have to get this number (suppose 294) based on the Date from the first object and you can relate the corresponding field in the second object as Day294__c.

date myDate = date.newInstance(1998, 10, 21);
Integer day = myDate.dayOfYear();
system.assertEquals(294, day);
  • Thansk Saroj. That was helpful. – Donald Reagan May 7 '18 at 4:12

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