Automation with time condition help

I have the awesome NHL sensor setup and I’m trying to setup an automation that triggers the day before a scheduled game is to take place. I can’t seem to figure out how to use the TIME template condition.

Basically I want to grab the time and date of the sensor (strptime I assume) and if it’s 1 day before that date then send a notification.

This is what I have so far and it does work:

- alias: Next Scheduled Game
    platform: state
    entity_id: sensor.nhl_hockey
    - service: notify.pushover
        message: "Next Scheduled Game: {{ states('sensor.next_game_date') }}, {{ states('sensor.next_game_time') }} "