ChangeLog - branch control and synchronization

I have a branch 4.0-dev which has plenty of changes in 2012 and 2013.

I have branch 4.1-dev which has a few changes from 2012.

In a clone of the repository, I created to test merges, there was a
conflict in the ChangeLog.  That conflict pointed out the differences
in 4.1-dev.  So I decided to create a preamble of

RELEASE 4.0: and RELEASE 4.1: marking in the ChangeLog which release
the changes belong to but that puts the dates out-of-sequence.  Is
this acceptable or should I modify the dates for the 4.1 changes
making the date not realistic to the commit?

-- 
Earnie
-- https://sites.google.com/site/earnieboyd

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