Oxford::Calendar − University of Oxford calendar conversion routines
use Oxford::Calendar; print "Today is ", Oxford::Calendar::ToOx(reverse Date::Calc::Today);
This module converts University of Oxford dates (Oxford academic dates) to and from Real World dates, and provides information on Terms of the University.
The Terms of the University are defined by the Regulations on the number and lengths of terms, available online from
This document describes the start and end dates of Oxford Terms.
In addition to this, the dates of Full Term, required to calculate the week number of the term, are prescribed by Council, and published periodically in the University Gazette.
Full term comprises weeks 1−8 inclusive, but sometimes, dates outside of full term are presented in the Oxford academic date format. This module will optionally provide such dates.
Data for these prescribed dates may be supplied in the file /etc/oxford−calendar.yaml; if this file does not exist, built-in data will be used. The built-in data is periodically updated from the semi-authoritative source at
or the authoritative source, the Gazette, available online from
<http://www.ox.ac.uk/about_the_university/university_year/index.html> describes the academic year at Oxford.
An Oxford academic date has the following format:
<day of week>, <week number>[st,nd,rd,th] week, <term name> <year>
where term name is one of
Friday, 8th Week, Michaelmas 2007
ToOx($day, $month, $year, [\%options])
Given a day, month and year in standard human format (that is, month is 1−12, not 0−11, and year is four digits) will return a string of the form
Day, xth week, Term year
or an array
(Day, week of term, Term, year)
depending on how it is called. The exact behaviour is modified by the ’mode’ option described below.
If the requested date is not in full term or extended term (see below), undef will be returned.
If the requested date is not covered by the database, ToOx will die with an "out of range" error message. Therefore it is recommended to eval ToOx with appropriate error handling.
%options can contain additional named parameter options:
Several modes are available:
Term dates will only be returned if the date requested is part of a full term (as defined by the web page above).
Term dates will only be returned if the date requested is part of an extended term, or statutory term.
Will return term dates based on the nearest term, even if the date requested is not part of an extended term (i.e. will include fictional week numbers).
This is currently the default behaviour, for backwards compatibility with previous releases; this may be changed in future.
If true, ignores dates marked as provisional in the database.
ThisTerm($year, $month, $day)
Given a year, month, term in standard human format (that is, month is 1−12, not 0−11, and year is four digits) will returns the current term or undef if in vacation or unknown. The term is given as an array in the form (year, term).
NextTerm($year, $month, $day)
Given a day, month and year in standard human format (that is, month is 1−12, not 0−11, and year is four digits) will return the next term (whether or not the date given is in term time). The term is given as an array in the form (year, term).
Returns a hash reference keyed on terms for a given year, the value of each being a hash reference containing start and end dates for that term. The dates are stored as array references containing numeric year, month, day values.
Note: these are the statutory term dates, not full term dates.
Takes a free-form description of an Oxford calendar date, and attempts to divine the expected meaning. If the name of a term is not found, the current term will be assumed. If the description is unparsable, undef is returned. Otherwise, an array will be returned of the form "($year,$term,$week,$day)".
This function is experimental.
FromOx($year, $term, $week, $day)
Converts an Oxford date into a Georgian date, returning a string of the form "DD/MM/YYYY" or undef.
If the requested date is not covered by the database, FromOx will die with an "out of range" error message. Therefore it is recommended to eval ToOx with appropriate error handling.
Bugs may be browsed and submitted at
Simon Cozens is the original author of this module.
Eugene van der Pijll, "pijll AT cpan DOT org" took over maintenance from Simon for a time.
Dominic Hargreaves currently maintains this module for the Computing Services, University of Oxford.