feat: Add holidays for Serbia

v2/rs/rs_holidays.go

@@ -0,0 +1,115 @@
+// (c) Rick Arnold. Licensed under the BSD license (see LICENSE).
+
+// Package rs provides holiday definitions for Serbia.
+package rs
+
+import (
+	"time"
+
+	"github.com/rickar/cal/v2"
+	"github.com/rickar/cal/v2/aa"
+)
+
+var (
+	// NovaGodina represents New Year's Day on 1-Jan
+	NovaGodina = aa.NewYear.Clone(&cal.Holiday{Name: "Nova godina", Type: cal.ObservancePublic})
+
+	// DrugiDanNoveGodine represents the second day of New Year's on 2-Jan
+	DrugiDanNoveGodine = &cal.Holiday{
+		Name:  "Drugi dan Nove godine",
+		Type:  cal.ObservancePublic,
+		Month: time.January,
+		Day:   2,
+		Func:  cal.CalcDayOfMonth,
+	}
+
+	// Bozic represents Orthodox Christmas Day on 7-Jan (Julian calendar)
+	Bozic = &cal.Holiday{
+		Name:   "Božić",
+		Type:   cal.ObservancePublic,
+		Month:  time.January,
+		Day:    7,
+		Julian: true,
+		Func:   cal.CalcDayOfMonth,
+	}
+
+	// DanDrzavnosti represents Statehood Day on 15-Feb
+	DanDrzavnosti = &cal.Holiday{
+		Name:  "Dan državnosti",
+		Type:  cal.ObservancePublic,
+		Month: time.February,
+		Day:   15,
+		Func:  cal.CalcDayOfMonth,
+	}
+
+	// DrugiDanDrzavnosti represents the second day of Statehood Day on 16-Feb
+	DrugiDanDrzavnosti = &cal.Holiday{
+		Name:  "Drugi dan Dana državnosti",
+		Type:  cal.ObservancePublic,
+		Month: time.February,
+		Day:   16,
+		Func:  cal.CalcDayOfMonth,
+	}
+
+	// PraznikRada represents Labour Day on 1-May
+	PraznikRada = aa.WorkersDay.Clone(&cal.Holiday{Name: "Praznik rada", Type: cal.ObservancePublic})
+
+	// DrugiDanPraznikaRada represents the second day of Labour Day on 2-May
+	DrugiDanPraznikaRada = &cal.Holiday{
+		Name:  "Drugi dan Praznika rada",
+		Type:  cal.ObservancePublic,
+		Month: time.May,
+		Day:   2,
+		Func:  cal.CalcDayOfMonth,
+	}
+
+	// VelikiPetak represents Orthodox Good Friday (movable, 2 days before Orthodox Easter)
+	VelikiPetak = &cal.Holiday{
+		Name:   "Veliki petak",
+		Type:   cal.ObservancePublic,
+		Func:   cal.CalcEasterOffset,
+		Julian: true,
+		Offset: -2,
+	}
+
+	// Vaskrs represents Orthodox Easter Sunday (movable)
+	Vaskrs = &cal.Holiday{
+		Name:   "Vaskrs",
+		Type:   cal.ObservancePublic,
+		Func:   cal.CalcEasterOffset,
+		Julian: true,
+	}
+
+	// VaskrsnjiPonedeljak represents Orthodox Easter Monday (movable, 1 day after Orthodox Easter)
+	VaskrsnjiPonedeljak = &cal.Holiday{
+		Name:   "Vaskršnji ponedeljak",
+		Type:   cal.ObservancePublic,
+		Func:   cal.CalcEasterOffset,
+		Julian: true,
+		Offset: 1,
+	}
+
+	// DanPrimirja represents Armistice Day on 11-Nov
+	DanPrimirja = &cal.Holiday{
+		Name:  "Dan primirja u Prvom svetskom ratu",
+		Type:  cal.ObservancePublic,
+		Month: time.November,
+		Day:   11,
+		Func:  cal.CalcDayOfMonth,
+	}
+
+	// Holidays provides a list of the standard national holidays
+	Holidays = []*cal.Holiday{
+		NovaGodina,
+		DrugiDanNoveGodine,
+		Bozic,
+		DanDrzavnosti,
+		DrugiDanDrzavnosti,
+		PraznikRada,
+		DrugiDanPraznikaRada,
+		VelikiPetak,
+		Vaskrs,
+		VaskrsnjiPonedeljak,
+		DanPrimirja,
+	}
+)

v2/rs/rs_holidays_test.go

@@ -0,0 +1,77 @@
+// (c) Rick Arnold. Licensed under the BSD license (see LICENSE).
+
+package rs
+
+import (
+	"testing"
+	"time"
+
+	"github.com/rickar/cal/v2"
+)
+
+func d(y, m, d int) time.Time {
+	return time.Date(y, time.Month(m), d, 0, 0, 0, 0, cal.DefaultLoc)
+}
+
+func TestHolidays(t *testing.T) {
+	tests := []struct {
+		h       *cal.Holiday
+		y       int
+		wantAct time.Time
+		wantObs time.Time
+	}{
+		{NovaGodina, 2024, d(2024, 1, 1), d(2024, 1, 1)},
+		{NovaGodina, 2025, d(2025, 1, 1), d(2025, 1, 1)},
+		{NovaGodina, 2026, d(2026, 1, 1), d(2026, 1, 1)},
+
+		{DrugiDanNoveGodine, 2024, d(2024, 1, 2), d(2024, 1, 2)},
+		{DrugiDanNoveGodine, 2025, d(2025, 1, 2), d(2025, 1, 2)},
+		{DrugiDanNoveGodine, 2026, d(2026, 1, 2), d(2026, 1, 2)},
+
+		{Bozic, 2024, d(2024, 1, 7), d(2024, 1, 7)},
+		{Bozic, 2025, d(2025, 1, 7), d(2025, 1, 7)},
+		{Bozic, 2026, d(2026, 1, 7), d(2026, 1, 7)},
+
+		{DanDrzavnosti, 2024, d(2024, 2, 15), d(2024, 2, 15)},
+		{DanDrzavnosti, 2025, d(2025, 2, 15), d(2025, 2, 15)},
+		{DanDrzavnosti, 2026, d(2026, 2, 15), d(2026, 2, 15)},
+
+		{DrugiDanDrzavnosti, 2024, d(2024, 2, 16), d(2024, 2, 16)},
+		{DrugiDanDrzavnosti, 2025, d(2025, 2, 16), d(2025, 2, 16)},
+		{DrugiDanDrzavnosti, 2026, d(2026, 2, 16), d(2026, 2, 16)},
+
+		{PraznikRada, 2024, d(2024, 5, 1), d(2024, 5, 1)},
+		{PraznikRada, 2025, d(2025, 5, 1), d(2025, 5, 1)},
+		{PraznikRada, 2026, d(2026, 5, 1), d(2026, 5, 1)},
+
+		{DrugiDanPraznikaRada, 2024, d(2024, 5, 2), d(2024, 5, 2)},
+		{DrugiDanPraznikaRada, 2025, d(2025, 5, 2), d(2025, 5, 2)},
+		{DrugiDanPraznikaRada, 2026, d(2026, 5, 2), d(2026, 5, 2)},
+
+		{VelikiPetak, 2024, d(2024, 5, 3), d(2024, 5, 3)},
+		{VelikiPetak, 2025, d(2025, 4, 18), d(2025, 4, 18)},
+		{VelikiPetak, 2026, d(2026, 4, 10), d(2026, 4, 10)},
+
+		{Vaskrs, 2024, d(2024, 5, 5), d(2024, 5, 5)},
+		{Vaskrs, 2025, d(2025, 4, 20), d(2025, 4, 20)},
+		{Vaskrs, 2026, d(2026, 4, 12), d(2026, 4, 12)},
+
+		{VaskrsnjiPonedeljak, 2024, d(2024, 5, 6), d(2024, 5, 6)},
+		{VaskrsnjiPonedeljak, 2025, d(2025, 4, 21), d(2025, 4, 21)},
+		{VaskrsnjiPonedeljak, 2026, d(2026, 4, 13), d(2026, 4, 13)},
+
+		{DanPrimirja, 2024, d(2024, 11, 11), d(2024, 11, 11)},
+		{DanPrimirja, 2025, d(2025, 11, 11), d(2025, 11, 11)},
+		{DanPrimirja, 2026, d(2026, 11, 11), d(2026, 11, 11)},
+	}
+
+	for _, test := range tests {
+		gotAct, gotObs := test.h.Calc(test.y)
+		if !gotAct.Equal(test.wantAct) {
+			t.Errorf("%s %d: got actual: %s, want: %s", test.h.Name, test.y, gotAct.String(), test.wantAct.String())
+		}
+		if !gotObs.Equal(test.wantObs) {
+			t.Errorf("%s %d: got observed: %s, want: %s", test.h.Name, test.y, gotObs.String(), test.wantObs.String())
+		}
+	}
+}