| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:09.42 | Toronto Grand Prix | 2026-01-24 |
| 100m Breaststroke | 1:08.06 | 2026 U SPORTS Swimming Championships | 2026-03-12 |
| 100m Freestyle | 58.20 | Coupe_Universitaire_3_11082025 | 2025-11-08 |
| 100m IM | 1:03.34 | Toronto Varsity Blues vs McGill | 2025-11-16 |
| 200m IM | 2:30.43 | Toronto Grand Prix | 2026-01-24 |
| 50m Backstroke | 29.58 | UT QUAD Meet (vs Calgary, Western, Quebec) | 2026-01-23 |
| 50m Breaststroke | 35.14 | Toronto Grand Prix | 2026-01-24 |
| 50m Breaststroke | 31.83 | 2026 U SPORTS Swimming Championships | 2026-03-12 |
| 50m Butterfly | 29.14 | Toronto Grand Prix | 2026-01-24 |
| 50m Butterfly | 27.64 | 2026 U SPORTS Swimming Championships | 2026-03-12 |
| 50m Freestyle | 27.00 | UT QUAD Meet (vs Calgary, Western, Quebec) | 2026-01-23 |
Day, Nathalie's top personal bests include 100m Backstroke (1:09.42), 100m Breaststroke (1:08.06), 100m Freestyle (58.20), 100m IM (1:03.34), 200m IM (2:30.43).
Day, Nathalie swims for McGill University.
Day, Nathalie has competed in 5 meets.