Calendar : 4500 BC to 4500 AD

A long-range calendar app for exploring dates from 4500 BC to 4500 AD. Jump to any year and month in seconds, check the day of the week for any date, and scan centuries with smooth, fast navigation. Ideal for historians, educators, writers, genealogy research, and anyone curious about historical and future dates. Lightweight, offline-friendly, and easy to use, this calendar app doubles as a precise date calculator and day-of-week finder for both BC and AD dates. Core features include millennia-spanning calendar navigation, instant day-of-week lookup for any date, and quick jump controls to reach specific years and months efficiently. Designed for clarity and speed to support research, productivity, and learning.