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R package · Weeks & dates

Time functions for public health.

Easy, consistent time conversion for public health — between date, ISO week, ISO yearweek, ISO year, calendar month and year, and season week.

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Highlights

01

ISO week conversions

Convert between date, ISO year, ISO week and ISO yearweek. The suffix says what comes back: _c a character string, _n a number.

02

Season week

Convert between ISO week and season week. Season week numbers the weeks within an epidemiological season, so influenza and other seasonal data line up across years.

03

Bundled calendars

Lookup tables give the dates within each ISO yearweek. Two more tables give Norwegian public holidays and workday counts, by date and by ISO yearweek. All three are ready to join into a surveillance dataset.