Query regarding tier 2 to ILR

[Sabi%]

Hi,
I was sponsored by my company and got tier 2 visa in October 2013. However, as I had told about intention to travel to india for wedding and needing long leave for the same, they gave me a start date of February 2014. I am planning to apply for ILR in April 2019 and 5 year counting period goes back to March 2014. Do I need to show my absences from UK just for 5 year counting period or since I got the tier 2 visa? If so, do I need to show proof of absence for every absence? I will have employer letter for absences since I started employment but what proof should I show for before that? Do I need a letter from HR stating that they had approved a later start date to allow me to go for my wedding? There was a 4 month gap since my visa and start date, but employer had no issues. Do I need anything to support this?

P.S- I entered UK in 2010, had student visa, then post study visa and switched to tier 2 in 2013. Do I need to show my absences from UK since 2010? On ILR application form they ask for date when you first entered Uk and absences since you first entered UK?

[zimba]

You need employer letter for all UK absences within the 5 years of Tier 2