<br />
	For a time axis, thus has the type <i>AXISTYPE_TIME</i>, this names the calendar used for the time steps, as one of the following constants defined in the pyferret module:
<dl><dt>CALTYPE_GREGORIAN</dt>
<dd>the proleptic gregorian calendar is used, with a leap year occurring every four years except for century years that are not a multiple of 400; thus, on average, the length of a year is 365.2425 days.</dd>
<dt>CALTYPE_JULIAN</dt>
<dd>the julian calendar is used, with a leap year occurring every fo