What constitutes a holiday changes over the years. The law particularly states certain holidays as public holidays such as Canada Day, Christmas, and Thanksgiving etc. Family Day is a paid public holiday under the Employment Standards Act, which is the newest holiday added to the list. The basic rule is that the public holiday is a normal day’s pay. You are only eligible for a public holiday if you work up to the public holiday and afterwards.
Seasonal employees are not defined anywhere in the Employment Standards Act. Public holidays does not apply to seasonal employees as they only work for a fraction of the year.