Day game is the exact same as night game in practice (e.g. getting phone numbers, meeting women) however, it’s during the day time.
There are many schools of thought surrounding the best approach for day game. Some gurus advocate direct game as more reliable during the day, while others still prefer indirect.
Day game is perceived as a better channel for meeting women for a few reasons:
1. More reliable numbers, dates and the possibility of higher quality women
2. Women prefer meeting men in everyday life because of the environment (think romantic comedies)
3. Women have less resistance to meeting new men for a romantic relationship during the day time.