I have a scenario wherein, there is a field "A" which takes "Date" value. Field "B" should display the Weekend date based on field value "A". Like if "A" = 21-Thursday. Field "B" should display date "23rd" as it is the weekend of specified date. Any suggestions pls?
This should work for you:
CASE( MOD(field A- DATE(1900, 1, 6),7), 0, field A + 7, 1, field A + 6, 2, field A + 5, 3, field A + 4, 4, field A + 3, 5, field A + 2, 6, field A + 1, NULL )
Note that if a record is created on a Saturday, this will calculate the following Saturday. If you'd like to change that and return the same date you can just remove the '+7' from the first statement.
Hope this helps.
Apex Date methods have a function called ToStartOfWeek which returns start of the week depending on the users locale. Once you have that, it should be easy to get the weekend date.
Date weekStart = myDate.toStartofWeek();