Based on the search results, it seems that Thanksgiving Monday is a statutory holiday in Canada, and as such, most government offices and services such as libraries are closed. Most malls and big box stores are also closed, while most drug stores are open. Grocery stores may be open, but this can vary depending on the location and the store chain. For example, all Sobeys, Atlantic Superstore, Costco, and Walmart locations are closed on Thanksgiving Monday in Halifax. It is recommended to check with individual stores for their holiday hours.