Canada Post is providing the following guidelines for shipping deadlines, to ensure your parcel arrives by Christmas.
Local - December 21
Regional - December 19 - 21
National - December 13-20
Generally, for Fabric Spark, we find that local means Toronto, Regional means Ontario, National the rest of the country. The date ranges also are important. If you're in a major city, you may be able to stretch it to the end of the date range, smaller centres or remote locations will likely need the earlier deadlines.