+some blogs.
+
+The [[ikiwiki-calendar]] command is used to force generating year and month
+pages from templates (overriding the existing ones).
+
+## Setup options
+
+* `archivebase` - Default value for [[ikiwiki/directive/calendar]] directive
+ option of the same name.
+* `archive_pagespec` - [[ikiwiki/PageSpec]] of pages to include in the
+ archives, if option `calendar_autocreate` is on. It defaults to `*`.
+* `calendar_autocreate` - Control whether new archive pages are created as
+ needed. It defaults to being done only if option `archivebase` is set.
+* `calendar_fill_gaps` - If set (and `calendar_autocreate` is set as well),
+ build calendar pages of empty years and months (but does not build pages older
+ than the older page, and younger than the younger page of the pagespec). If
+ not, those empty calendar pages will be skipped. *Please note:*
+ * The archive pages will not be automatically updated if this option changes.
+ It is up to the user to delete relevant pages, and rebuild the wiki.
+ * When `calendar_fill_gaps` is set, and a post is deleted, making the
+ corresponding year/month empty, the corresponding page is left, and shows
+ an empty calendar. This is on purpose, not to break any external link
+ pointing to this particular page. If you do not like it, delete the
+ relevant pages, and rebuild the wiki.
+
+## CSS
+
+The output is liberally sprinkled with classes, for fine grained CSS
+customization.
+
+* `month-calendar` - The month calendar as a whole.
+* `month-calendar-head` - The head of the month calendar (ie,"March").
+* `month-calendar-arrow` - Arrow pointing to previous/next month.
+* `month-calendar-day-head` - A column head in the month calendar (ie, a
+ day-of-week abbreviation).
+* `month-calendar-day-noday`, `month-calendar-day-link`,
+ `month-calendar-day-nolink`, `month-calendar-day-future`,
+ `month-calendar-day-this-day` - The day squares on the month calendar,
+ for days that are not in the month (before or after the month itself), that
+ don't have links, that do have links, that are in the future, or are that
+ are the current day, respectively.
+* `Sunday`, `Monday`, `Tuesday`, ... - Each day square is also given a class
+ matching its (localised) day of week, this can be used to highlight
+ weekends.
+* `year-calendar` - The year calendar as a whole.
+* `year-calendar-head` - The head of the year calendar (ie, "2007").
+* `year-calendar-arrow` - Arrow pointing to previous/next year.
+* `year-calendar-subhead` - For example, "Months".
+* `year-calendar-month-link`, `year-calendar-month-nolink`,
+ `year-calendar-month-future`, `year-calendar-this-month` - The month
+ squares on the year calendar, for months with stories,
+ without, in the future, and currently selected, respectively.