Date of PhD award Oxbridge This question is similar to the date of PhD award in France, but for the case of Oxbridge (maybe all of UK, but I don't know).
There is the date of the defense (behind closed doors), after which one may recieve no corrections, minor corrections, or major corrections (re-submit thesis). After the corrections are done the thesis is given to the University, and one can be &quot;approved&quot; for a PhD. But one only receives the certificate after a graduation ceremony, which may be years (typically weeks or months) later.
Which of these dates should I choose for fellowship applications etc? I have

Date I defended
Date I submitted the last version of the thesis
Date thesis was approved
Date I left the university to work elsewhere (become a postdoc)
Date I graduated. (This is on the official transcript.)

In this chronological order. I obviously don't care personally, but often there are requirements such as &quot;this and that many years after your PhD&quot;.
The multitude of dates that would make sense is not at all specific to Oxbridge, and many funding bodies will clarify which date they want in the fine print.
If they don't specify otherwise, then the graduation date is a safe bet, as this is the date written on the certificate. In my experience, &quot;at most x years post PhD&quot; restrictions are far more common, and for those the graduation date will be the most beneficial one for you anyway.
If its not specified, and if the graduation date would disqualify you, but one of date of defense and submission date for the final version would work, then it makes sense to get in touch with whoever is in charge to make the case that they should consider you.