The date part —which is leading a fixed date text of a Gcal resource file line— may be provided with further attributes, that are either specifications of lists of days or ranges of days, which provide the information at which date a fixed date happens. More further attributes are the repetition factor as well as the appearance factor.
All of those date parts in a Gcal resource file line, which are structured as follows, may generally be provided with further attributes:
If the date part is supplied with further attributes and the year of the fixed date is not given in a concrete manner, i.e. the year yyyy is set to zero, such kinds of fixed dates are only computed correctly in simple year bounds —which means during a current year— and not in fixed dates shown after the current year has changed, e.g. in fiscal years.