6M+ DownloadsA validated tool for calculating epidemiological weeks, built for public health professionals and researchers worldwide
EpiWeeks
Epidemiological Weeks Calculation
Current Week
Based on today's date (UTC)
Year
2026Week
45System
Start Date
Sun 08 Nov 2026End Date
Sat 14 Nov 2026Need a different date or week? Use the Epi Week Calculator
Why EpiWeeks
Built on a validated Python package that follows the official CDC and ISO systems
6M+ Downloads
Used by public health professionals and developers worldwide.Dual System Support
Supports both CDC (MMWR) and ISO week numbering systems.Accurate & Reliable
Validated against official MMWR week reference tables.Well Documented
Complete documentation with examples and integration guides.Lightweight
Minimal footprint with zero external dependencies.Developer Friendly
Type-safe API with full annotations for seamless integration.In Their Words
What public health teams write about the epiweeks Python package
Standard software packages for R and Python can help you convert from dates to epiweeks and vice versa.
[Lists epiweeks among the standard Python packages.]
US CDC, COVID-19 Forecast HubForecast Hub guidelines
We check the week-ending dates provided in the NCHS mortality data and use Python package
epiweeksto convert them into epiweek format.
Carnegie Mellon University, Delphi Research GroupDelphi Epidata documentation
…the issue was attempting to homogenize epidemiological weeks with time series calendar months format. Later on we discovered the
epiweekspython package.
UN Refugee Agency (UNHCR), Project JetsonProject Jetson wiki
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Adopted by public health authorities and research institutions around the worldplus thousands of researchers and developers