Add register_holiday function

gui.lua

@@ -12,7 +12,7 @@ local COLOR_DAYBOX_TODAY = "#FFFFFF80"
 
 local player_current_calendars = {}
 
-local ORDINAL = false
+local ORDINAL = true
 
 local function show_calendar(player_name, ordinal, wanted_months, wanted_years)
 	local days, months, years = calendar.get_date()
@@ -33,9 +33,9 @@ local function show_calendar(player_name, ordinal, wanted_months, wanted_years)
 	end
 	local formspec = "formspec_version[3]size["..(calendar.WEEK_DAYS+2)..",10]"
 	if ordinal then
-		formspec = formspec .. "label[0.5,0.5;"..F(S("@1, year @2", calendar.month_names[wanted_months+1], wanted_dyears)).."]"
+		formspec = formspec .. "label[0.5,0.5;"..F(S("Month @1, year @2", wanted_dmonths, wanted_dyears)).."]"
 	else
-		formspec = formspec .. "label[0.5,0.5;"..F(S("@1, @2 years", calendar.month_names[wanted_months+1], wanted_dyears)).."]"
+		formspec = formspec .. "label[0.5,0.5;"..F(S("@1 months, @2 years", wanted_dmonths, wanted_dyears)).."]"
 	end
 	local start_day, end_day
 	local tdays = 0

init.lua

@@ -25,36 +25,22 @@ calendar.weekday_names_short = { S("Mo"), S("Tu"), S("We"), S("Th"), S("Fr"), S(
 calendar.WEEK_DAYS = #calendar.weekday_names
 calendar.FIRST_WEEK_DAY = 0
 
-local holidays = {
-	{ name = S("New Year's Eve"),
-	  days = 0,
-          months = 0
-	},
-	{ name = S("Lucky Day"),
-	  days = 7,
-          months = 7
-	},
-	{ name = S("Bad Luck Day"),
-	  days = 13,
-          months = 2
-	},
-	{ name = S("Boxing Day"),
-	  days = 23,
-          months = 11
-	},
-	{ name = S("Scary Day"),
-	  days = 29,
-          months = 8
-	},
-	{ name = S("Fool's Day"),
-	  days = 0,
-          months = 3
-	},
-	{ name = S("Sylvester"),
-	  days = 29,
-          months = 11
-	},
-}
+local holidays = {}
+
+-- Register a holiday.
+-- def: Table with these fields:
+-- * name: Human-readable name
+-- * days: Cardinal month day on which the holiday occurs
+-- * months: Cardinal month on which the holiday occurs
+calendar.register_holiday = function(def)
+	table.insert(holidays, def)
+end
+
+calendar.register_holiday({
+	name = S("New Year's Eve"),
+	days = 0,
+	months = 0
+})
 
 calendar.get_holidays = function(total_days)
 	local days, months, years = calendar.get_date(total_days)