Biweekly may refer to an event that occurs either twice weekly or once every two weeks. The usage "every two weeks" is more common, but both usages are common and may lead to ambiguity. There are 52 full weeks in a year of 12 months (ISO 8601 defines a year as containing 52 or 53 weeks), making for a possible 26 or 104 biweekly events in a year. This is a greater number than if such events were held twice a month, because most months have more than four weeks (28 days).
In the United Kingdom, Australia and New Zealand, the term fortnightly is more commonly used.
References and Notes
- "biweekly". Online dictionary. Merriam-Webster. Retrieved 19 February 2008.
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