The rotation of the earth causes water to circle away from the equator. It takes the earth exactly 365 days 5 hours 48 minutes and 46 seconds to revolve around the sun. There is no such thing as a tidal waves. They are actually Tsunamis. Tsunamis are created by an earthquake on the ocean floor.
Tidal waves are actually high and low tide that are mislabeled.
Therefore tides are created. The earth is spinning slower and slower. Tomorrow will be longer than yesterday. The day gets longer by about one second each year. The day has grown longer by 32 leap seconds in the last 50 years or so.