Looking for some advice on Working Visas

[joebloggs]

I believe it's possible to apply for ILR 28 days in advance of the exact 5 year date. .

absences in the 5 yr. period should not exceed 180 days in total and 90 days in a single trip. Work related absences can be discounted when supported by employer letter.

the qualifying period for ILR is 5yrs in the uk - upto 28 days.

so what is the date their visa was issued and when did they arrive in the uk ?