It varies by company; there’s no universal rule that holiday pay has to be time and a half. In many places, employers aren’t legally required to offer extra pay for holidays at all (unless it pushes you into overtime), so some give 1.5x, some double pay, and some just treat it like a normal day. In my experience, it really comes down to company policy or your contract, so it’s worth checking your employee handbook or HR for the exact details.