Hi Arcadi,
Thanks for your reply and glad that we found out the issue. I will try this out today and let you know how it goes.
But as you said the calendar intervals are not treated as same from 5.3.0 onwards, is this change log documented somewhere (may be in any of the release notes)?. It would be good to have it documented somewhere. If it is already there, can you please share me the link to that? I have gone through the documentations before I posted this and if I were able to find what you said was the change happened, it would have saved a lot of time for both of us and I would like to know if I was looking in a wrong direction. I understand the php code was updated, but the change log is the one we go through first to understand what all changes has happened from the previous releases.
Once again thanks.