I would give 1 week (or 2 maximum) buffer , with mt fingers crossed for the stupid c-24 not activated until June/July/AUg/Sep.../2016/2099....scylla said:I would not even if you are 100% sure of the dates of your calculation. When we received my husband's CBSA report - several (around 6?) of his trips were off by a day (i.e. the CBSA report showed him returning a day later than he actually did). CIC used the CBSA dates (not our dates). So if you give yourself no buffer - this could put you under by CIC's calculation. Anyway - just my two cent based on my experience.