Here is a tutorial showing you how to change Date and Time formats (US, International, etc) on Windows 11 using Settings or Control Panel.

Use Windows 11 Time and Language Settings to change the Language, Time zone, Date, Calendar, Region, and more. Add a clock or change the formats!

Year to date (YTD) refers to the period beginning on the first day of the current calendar or fiscal year and extending up to the current date.

Using relative and radiometric dating methods, geologists are able to answer the question: how old is this fossil?