This research is verified for the rule most employers need first: federal law does not require private employers to provide paid holidays, paid time off for holidays, or extra pay simply because work happens on a holiday. For most businesses, holiday pay starts with what the employer promised in a handbook, offer letter, union agreement, written policy, or repeated practice.
Rhode Island is correctly treated as the broad state-law exception. Its Sunday and holiday premium rule requires at least 1.5 times the normal rate for covered Sunday and holiday work, subject to statutory exemptions. Massachusetts is correctly treated as historical: its former retail Sunday and holiday premium was phased out and is no longer a current general premium-pay rule.
The research is also verified for the bigger payroll risk: once an employer chooses to pay a holiday bonus or holiday premium, federal regular-rate rules can matter. A truly discretionary holiday gift can be excluded. An announced, promised, expected, or formula-based holiday bonus usually belongs in the regular rate for overtime. A qualifying 1.5x holiday premium can be excluded from the regular rate and credited toward overtime for the same hours.
The narrower federal-contractor and religious-accommodation sections are also verified. Davis-Bacon and Service Contract Act obligations depend on the covered contract and wage determination. Religious-holiday scheduling is not a holiday-pay rule, but after Groff v. DeJoy an employer denying an accommodation needs a substantial-cost showing, not just minor inconvenience.