What is the "Day Number" of the year (Julian Day)?
Quick Answer: The "Day Number" or Julian Day of the year is the count of days from January 1st to the current date. For example, January 1st is Day 1, January 2nd is Day 2, and so on, up to December 31st, which is Day 365 or 366 in a leap year.
The "Day Number" helps track the specific day within a year without mentioning the month or date. It’s especially handy in data logging, astronomy, and programming.
To find it, simply count how many days have passed since January 1st, including today. Leap years add an extra day on February 29, making the total 366 days instead of 365.