At the beginning of the movie, when walking up the stairs, the main character's purse does not have a scarf tied to in. Further up the stairs, there is a scarf tied to it.
When Nicholas says Valentine's Day is on Saturday, the year would be 2015, not 2021 when this film first aired. 2015 was the last time Valentine's Day fell on a Saturday. The next occurrence will be in 2026.