These pages list "one-off" events as distinct from weekly or fortnightly club meetings. They generally (but not always) take place at weekends, usually with a named band and caller. Although they are "one-off" events most of them are part of a series of events held through the year by that particular organization.
The dates are listed in date order with two months to each page.
You should expect to pay a bit more to attend one of these events than for a club meeting because you are paying for a much longer session and because your music will usually be provided by a full band rather than (often) a single musician or by a caller using recorded music.