On my exam certifiate it says date of issue - not date of award, For question 1.26 when it asks for the date of award to i write the date i took the exam or the date i receievd the certificate?

Hi, I have 2 questions - Do I need to add the exact date the I came to the UK? I came when I was 15 and do not remember the exact date just that it was at the end of June - is there anyway I can find out if this is absolutely necessary? - On the section where you add in information when you left the ...