如何将日期中的月份替换为特定月份？

Question

I have a list of dates from different months and I need to replace the months with specific month (December in this case).

I tried to convert date format to show month in words eg 01 for Jan. Then, used replace wizard to replace Jan to Dec. But it failed.

For example:
Current Date  Expected Date
18/01/2018    18/12/2018
20/02/2018    20/12/2018
31/03/2018    31/12/2018
04/04/2018    04/12/2018
19/05/2019    19/12/2018

Answer 1

If the date are true dates then:

=DATE(YEAR(A2),12,DAY(A2))