Dhanu, Dhanus or Dhanurmas (धनुर्मास) is a month in the Hindu calendar, Malayalam calendar and others.[1][2] It corresponds to the zodiacal sign of Sagittarius, and overlaps with approximately the second half of December and about the first half of January in the Gregorian calendar.[1]
Lochtefeld2002p425
was invoked but never defined (see the help page).