Sinclair Secondary School

Summer Operating Hours

For the months of July and August, the DDSB Education Centre at 400 Taunton Road East, Whitby is open Monday through Thursday, 8:00 am – 4:00 pm.

Registration, secondary school transcripts, and other services are available through this website.

School offices are now closed and will re-open Monday, August 25, 2025.

First day of classes for regular calendar schools is Tuesday, September 2, 2025.

Please check calendars for start dates at all modified calendar schools.

*Summer Friday Closures at the Education Centre

July 4, 11, 18, 25

August 1, 8, 15, 22

*Holiday Closures

Tuesday, July 1 - Canada Day

Monday, August 4 - Civic Holiday

Monday, September 1 - Labour Day

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Apply now for the 2025-2026 Parent Involvement Committee