The phrase "approximate date" refers to a date that is not exact but provides a general idea or estimate of when something happened or is expected to happen. Full definition
Additionally, the applicant has the right to written notice of approximate date of destruction and request a copy of the document. (phoenixcharteracademy.org)
You will, at the least, need approximate dates of employment for each job you have held, along with brief descriptions of your responsibilities. (careertrend.com)
We had provided hardware requirements to qualify for ICS but still to make it clear, we have put together all the mobile phones expected to get ICS along with the phones which has got ICS confirmation and approximate date when will they get the update. (androidadvices.com)