About EpiWeeks
EpiWeeks is a validated tool for calculating epidemiological weeks, used by public health professionals and organizations worldwide.
What is this website?
EpiWeeks is the companion website for the EpiWeeks Python package, a validated library for calculating epidemiological weeks following the official CDC (MMWR) and ISO week numbering systems used worldwide for disease surveillance and public health reporting.This website brings that same accuracy to anyone who needs it, without any programming. Simply look up any date or browse the weeks calendar and get the information you need in seconds.View Calendar
Learn More
Epi Weeks OverviewDefinition and significance of epidemiological weeks.
CDC Week SystemWeek definitions and usage for the CDC (MMWR) system.
ISO Week SystemWeek definitions and usage for the ISO 8601 system.
For Developers
For those who need to integrate epidemiological weeks calculation into their own applications, EpiWeeks is available as an open-source Python package. It provides a simple, well-documented API for working with both CDC and ISO week systems.