Here is the web siteThe date on the study permit is irrelevant. What matters is how long ago she completed her studies. You want to make sure you apply to change her status to visitor before she reaches 90 days after the day she completed her studies.
When to apply
If you want to extend your stay as a visitor or change your status (from international student or worker to visitor for example), you should apply at least 30 days before your current status expires.
The expiry date for your status is on
- the stamp in your passport (this is NOT the date included on your visitor visa)
- if you don’t have a stamp in your passport, the expiry date is 6 months from the day you entered Canada
- your study permit
- your work permit or
- your visitor record (if you’ve already extended your stay)