Beginning of the day's reading. A siman:seif reference like
"5:1" (chapter 5, paragraph 1). On Klalim/leap-option days the
value may be a non-numeric token (e.g. "Klalim", "Shmita").
End of the day's reading in the same siman:seif format, or
undefined if the day covers only a single paragraph. May end in
:E ("end of siman") to indicate the reading runs to the last
paragraph of the begin-siman.
Describes one day's reading in the Kitzur Shulchan Aruch calendar.