Question on Tune Up Timing

https://holdenbjqw462.northcrestbrief.com/posts/ac-repair-in-north-fort-worth-and-plumbing-help-under-one-roof-at-comfort-experts-2

Question on Tune Up Timing Does anyone know if spring or fall is better for a tune-up? Not sure when it makes the most sense for an older system in Summerfields, since the AC works hardest in summer but the furnace matters in winter