Every month should be 28 days, then one or two day holiday with the orphaned days for New Years

Because Romans were terrible people

Just make all months 28 days

@Deceptichum the ancient Persian system is 12 months of 30 days, and then 5 "intercalary days" leading up to Nowruz that was a period of celebration, with an extra month added every 120 years (or an extra day every 4 years is an early modern renovation)