Formula to show if date field is within first half or second half of the month?

Hi Tanu,

First make a custom field ( dateTest__c) of Formula Type and Formula return Type is Text then apply this formula
Formula:
IF(DAY( dateTest__c)>=15,
(CASE(MONTH( dateTest__c), 1, "January", 2, "February", 3, "March",  4, "April",  5, "May",  6, "June", 7, "July", 8, "August", 9, "September", 10, "October", 11, "November", 12, "December", "None") & " - " & "Second Half"),
(CASE(MONTH( dateTest__c), 1, "January", 2, "February", 3, "March",  4, "April",  5, "May",  6, "June", 7, "July", 8, "August", 9, "September", 10, "October", 11, "November", 12, "December", "None") ) & " - " & "First Half")

Formula will return the result August - First Half or August - Second Half.

Please remember to replace dateTest__c with the API name of your custom date field .

Hope this helps you.