The original Roman calendar divided the year from March to December into 10 months of either 29 or 31 days, based on lunar ...

Feb. 29 is more than just an extra day we have once every four years. There is some science behind it. Here's how leap days ...

Welcome once again to our weekly look at what's new on the Microsoft 365 roadmap website ... and even identify optimal days for in-office collaboration. The new calendar in Teams is designed ...