What is date of joining for company,PF & Gratuity?

I have appointed for one year training period from 01-09-2007 & I have confirmed from 01-09-2008.In training period company had didcuted my PF,ESI & also same amount deposited to concerned govt.authority.in training offer letter they said you will get stipend after confirmation they said salary.My PF NO.is same from training period ,so what is date of joining for co.PF & Gratuity?