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How to add days to date time in Salesforce Apex?

Hi I am using Salesforce Apex, I have a date as String as below. I need to add days to it using Apex.

String dateTime = '2017-07-08T23:59:59Z';

If I add one day to it then it should be 2017-07-09T23:59:59Z as string. How will I do this?

Thanks!

Solution

  • You need to convert the string to a DateTime and then add days. You can format it back after

    String stringDateTime = '2017-07-08T23:59:59Z';
DateTime dt = DateTime.valueOfGmt(stringDateTime);
DateTime tomorrow = dt.addDays(1);
DateTime nextMonth = dt.addMonths(1);
DateTime anniversary = dt.addYears(1);
String formattedDateTime = dt.format('yyyy-MM-dd\'T\'HH:mm:ss\'Z\'');