Early career

Growing up in a racing family, Day began driving dirt bikes at a young age. At age 9, he broke his arm after racing dirt bikes competitively, which ended his career with dirt bike racing. After years of going through the ranks, he decided to try a hand in sprint car racing, with the help of his family, including his father, Ronnie Day, who was a West Coast racing legend.

Day began driving sprint cars in 2016, racing in the USAC Restricted Mirco Sprints for his family-owned team. He ran eleven races with a best finish of 3rd at Keller Auto Raceway. He continued to have great success with sprint cars over the years, earning numerous victories in that time span. In 2021, he earned his first career USAC National Midget Series win at Circle City Raceway, becoming the youngest driver to win a USAC National Series event. In 2023, he won the King of the West Sprint Car Series and the Make-A-Wish Trophy Cup championships.[4] On December 8, it was announced that Day would run full-time in the Kubota High Limit Racing Series in 2024, driving the No. 14 for Jason Meyers Racing.[5] Throughout the season, he scored wins at RPM Speedway, Red Dirt Raceway, Riverside International Speedway, I-70 Motorsports Park, and Lake Ozark Speedway.

On April 27, 2024, it was announced that Day would make his debut in late model racing, driving the No. 88 Chevrolet for JR Motorsports at Hickory Motor Speedway. After finishing 7th in the first feature event, he started on the outside pole for the final feature. He would end up leading nearly every lap to win the race in his first career start.[12]

On July 24, 2024, it was announced that Day will run three races in the ARCA Menards Series for Pinnacle Racing Group, driving the No. 28 car with sponsorship from HendrickCars.com

NASCAR

(key) (Bold – Pole position awarded by qualifying time. Italics – Pole position earned by points standings or practice time. * – Most laps led.)

NASCAR Craftsman Truck Series results
Year	Team	No.	Make	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	NCTC	Pts	Ref
2024	McAnally-Hilgemann Racing	81	Chevy	DAY	ATL	LVS	BRI	COA	MAR	TEX	KAN	DAR	NWS	CLT	GTW	NSH	POC	IRP	RCH	MLW	BRI 18				MAR 18	PHO	40th	64
		91																				KAN 32	TAL	HOM 16

* Season still in progress
1 Ineligible for series points

(key) (Bold – Pole position awarded by qualifying time. Italics – Pole position earned by points standings or practice time. * – Most laps led. ** – All laps led.)

ARCA Menards Series results
Year	Team	No.	Make	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	AMSC	Pts	Ref
2024	Pinnacle Racing Group	28	Chevy	DAY	PHO	TAL	DOV	KAN	CLT	IOW	MOH	BLN	IRP	SLM 15	ELK	MCH	ISF	MLW	DSF	GLN				41st	106
		82																			BRI 7	KAN 4	TOL

ARCA Menards Series East results
Year	Team	No.	Make	1	2	3	4	5	6	7	8	AMSEC	Pts	Ref
2024	Pinnacle Racing Group	82	Chevy	FIF	DOV	NSV	FRS	IOW	IRP	MLW	BRI 7	45th	37