Are you trying for a spring crop, or just getting your full season plants out as early as possible? If your goal is a spring crop, you need to figure out the flower/veg trigger of the strains you are running, use the link below to put a date on that and work backwards from there. I always have to allow longer for spring crops to flower, so don't cut yourself out of flower time by going out too late. (of late I have been allowing my spring crop plants to reveg after harvest. It's a long life for the plant, but I've had pretty good luck with it so far. Over 50% make it to a 2nd harvest)
But if you are trying to get your full season plants out as early as possible, you will also use the link (input town near you) to determine when it's safe from early flower. Some strains will flower with 14 hours of daylight, so act accordingly. Good luck.
Calculations of sunrise and sunset in Oklahoma City – Oklahoma – USA for October 2024. Generic astronomy calculator to calculate times for sunrise, sunset, moonrise, moonset for many cities, with daylight saving time and time zones taken in account.
www.timeanddate.com