rdfs:member
http://hosi.org/ts/When/TM/CalDate
day:Christmas
christmas(-221)
day:Easter
easter(35)
day:Moveable_feast
Rogation Sunday
day:Week
http://hosi.org/When/Coordinates/Common::Week::Sunday
ts:coordinate
18
ts:frame
http://hosi.org/When/CalendarTypes/Julian
ts:sdn
2090829