Current Day of Year
About Day of Year
The day of year (also called "day number" or "ordinal date") is the sequential day number within a year, ranging from 1 to 365 (or 366 in leap years). Day 1 is January 1st, and the last day is December 31st.
This is useful for:
- Scientific calculations and data analysis
- Astronomical observations
- Progress tracking throughout the year
- Database indexing and queries
Get Day of Year in Programming
Learn how to calculate the day of year in various programming languages, databases, and spreadsheet applications:
Spreadsheets
=TODAY()-DATE(YEAR(TODAY()),1,0)Calculates day number starting from Jan 1. Returns the day of year (1-365 or 1-366).
Programming Languages & Databases
from datetime import datetime
day_of_year = datetime.now().timetuple().tm_yday
print(day_of_year)tm_yday returns the day of year (1-366).
Related Tools
Frequently Asked Questions
What is the day of the year?
The day of the year is a number from 1 to 365 (or 366 in leap years) representing which day of the year a specific date falls on. January 1st is day 1, and December 31st is day 365 or 366.
How do I calculate the day of the year in my programming language?
This page provides code examples for calculating the day of the year in various programming languages including JavaScript, Python, Java, PHP, and more. Each example shows how to get the day number using standard date libraries.
What is the difference between day of year and day number?
Day of year and day number are the same thing - they both refer to the sequential day number within a year, starting from 1 on January 1st.