vacanza · arkid15r · Oct 14, 2024 · Sep 27, 2024
@@ -10,17 +10,49 @@
 #  Website: https://github.com/vacanza/holidays
 #  License: MIT (see LICENSE file)
 
+from datetime import date
 from gettext import gettext as tr
 
-from holidays.groups import ChineseCalendarHolidays, InternationalHolidays
-from holidays.observed_holiday_base import ObservedHolidayBase, SAT_SUN_TO_NEXT_WORKDAY
-
-
-class Vietnam(ObservedHolidayBase, ChineseCalendarHolidays, InternationalHolidays):
+from holidays.calendars.gregorian import (
+    JAN,
+    FEB,
+    APR,
+    MAY,
+    SEP,
+    DEC,
+    MON,
+    TUE,
+    WED,
+    THU,
+    FRI,
+    SAT,
+    SUN,
+    _timedelta,
+)
+from holidays.groups import ChineseCalendarHolidays, InternationalHolidays, StaticHolidays
+from holidays.observed_holiday_base import (
+    ObservedHolidayBase,
+    ObservedRule,
+    SAT_TO_PREV_WORKDAY,
+    SUN_TO_NEXT_WORKDAY,
+    SAT_SUN_TO_NEXT_WORKDAY,
+)
+
+NATIONAL_DAY_RULE = ObservedRule({MON: +1, TUE: -1, WED: -1, THU: +1, FRI: -1, SAT: -1, SUN: +1})
+
+
+class Vietnam(ObservedHolidayBase, ChineseCalendarHolidays, InternationalHolidays, StaticHolidays):
     """
-    https://publicholidays.vn/
-    http://vbpl.vn/TW/Pages/vbpqen-toanvan.aspx?ItemID=11013 Article.115
-    https://www.timeanddate.com/holidays/vietnam/
+    References:
+        - `Labor Code 1994 (Art. 73) (en) <https://vbpl.vn/TW/Pages/vbpqen-toanvan.aspx?ItemID=2835>`_
+        - `Labor Code 2012 (Art. 115) (en) <https://vbpl.vn/TW/Pages/vbpqen-toanvan.aspx?ItemID=11013>`_
+        - `Labor Code 2012 (Art. 115) (vi) <https://vbpl.vn/TW/Pages/vbpq-toanvan.aspx?ItemID=27615>`_
+        - `Labor Code 2019 (Art. 112) (en) <https://vbpl.vn/TW/Pages/vbpqen-toanvan.aspx?ItemID=11135>`_
+        - `Labor Code 2019 (Art. 112) (vi) <https://vbpl.vn/TW/Pages/vbpq-van-ban-goc.aspx?ItemID=139264>`_
+
+    Substituted holidays:
+        - `2018-2019 <https://thuvienphapluat.vn/cong-van/EN/Lao-dong-Tien-luong/Official-Dispatch-6519-VPCP-KGVX-2018-national-holidays-for-public-sector-employees/387625/tieng-anh.aspx>`_
+        - `2024 <https://thuvienphapluat.vn/cong-van/EN/Lao-dong-Tien-luong/Official-Dispatch-2450-VPCP-KGVX-2024-swap-of-working-days-during-the-Reunification-Day/606458/tieng-anh.aspx>`_
     """
 
     country = "VN"
@@ -32,47 +64,81 @@ class Vietnam(ObservedHolidayBase, ChineseCalendarHolidays, InternationalHoliday
     def __init__(self, *args, **kwargs):
         ChineseCalendarHolidays.__init__(self)
         InternationalHolidays.__init__(self)
+        StaticHolidays.__init__(self, VietnamStaticHolidays)
         kwargs.setdefault("observed_rule", SAT_SUN_TO_NEXT_WORKDAY)
+        kwargs.setdefault("observed_since", 1995)
         super().__init__(*args, **kwargs)
 
+    def _add_lunar_new_year_observed(self, dt_lny: date) -> None:
+        if self._year <= 1994:
+            return None
+
+        day_names = {
+            # 29 of Lunar New Year.
+            -2: tr("29 Tết"),
+            # Fourth Day of Lunar New Year.
+            3: tr("Mùng bốn Tết Nguyên Đán"),
+            # Fifth Day of Lunar New Year.
+            4: tr("Mùng năm Tết Nguyên Đán"),
+            # Sixth Day of Lunar New Year.
+            5: tr("Mùng sáu Tết Nguyên Đán"),
+        }
+        for delta in range(-1, 4 if self._year >= 2013 else 3):
+            dt = _timedelta(dt_lny, delta)
+            dt_observed = self._get_observed_date(
+                dt,
+                rule=(
+                    SAT_TO_PREV_WORKDAY + SUN_TO_NEXT_WORKDAY
+                    if self._year >= 2014
+                    else SAT_SUN_TO_NEXT_WORKDAY
+                ),
+            )
+            if dt_observed != dt:
+                self._add_holiday(
+                    day_names[(dt_observed - dt_lny).days],  # type: ignore[operator]
+                    dt_observed,
+                )
+
     def _populate_public_holidays(self):
         dts_observed = set()
 
-        # New Year's Day
+        # New Year's Day.
         dts_observed.add(self._add_new_years_day(tr("Tết Dương lịch")))
 
-        # Lunar New Year's Eve
+        # Lunar New Year's Eve.
         self._add_chinese_new_years_eve(tr("Giao thừa Tết Nguyên Đán"))
 
-        # Lunar New Year
-        self._add_chinese_new_years_day(tr("Tết Nguyên Đán"))
+        # Lunar New Year.
+        lny = self._add_chinese_new_years_day(tr("Tết Nguyên Đán"))
 
-        # Second Day of Lunar New Year
+        # Second Day of Lunar New Year.
         self._add_chinese_new_years_day_two(tr("Mùng hai Tết Nguyên Đán"))
 
-        # Third Day of Lunar New Year
+        # Third Day of Lunar New Year.
         self._add_chinese_new_years_day_three(tr("Mùng ba Tết Nguyên Đán"))
 
-        # Fourth Day of Lunar New Year
-        self._add_chinese_new_years_day_four(tr("Mùng bốn Tết Nguyên Đán"))
-
-        # Fifth Day of Lunar New Year
-        self._add_chinese_new_years_day_five(tr("Mùng năm Tết Nguyên Đán"))
+        if self._year >= 2013:
+            # Fourth Day of Lunar New Year.
+            self._add_chinese_new_years_day_four(tr("Mùng bốn Tết Nguyên Đán"))
 
         if self._year >= 2007:
-            # Hung Kings' Commemoration Day
+            # Hung Kings' Commemoration Day.
             dts_observed.add(self._add_hung_kings_day(tr("Ngày Giỗ Tổ Hùng Vương")))
 
-        # Liberation Day/Reunification Day
+        # Liberation Day/Reunification Day.
         dts_observed.add(self._add_holiday_apr_30(tr("Ngày Chiến thắng")))
 
-        # International Labor Day
+        # International Labor Day.
         dts_observed.add(self._add_labor_day(tr("Ngày Quốc tế Lao động")))
 
-        # National Day
-        dts_observed.add(self._add_holiday_sep_2(tr("Quốc khánh")))
+        # National Day.
+        name = tr("Quốc khánh")
+        dts_observed.add(sep_2 := self._add_holiday_sep_2(name))
+        if self._year >= 2021:
+            self._add_holiday(name, self._get_observed_date(sep_2, NATIONAL_DAY_RULE))
 
         if self.observed:
+            self._add_lunar_new_year_observed(lny)
             self._populate_observed(dts_observed)
 
 
@@ -82,3 +148,28 @@ class VN(Vietnam):
 
 class VNM(Vietnam):
     pass
+
+
+class VietnamStaticHolidays:
+    # Date format (see strftime() Format Codes).
+    substituted_date_format = tr("%d/%m/%Y")
+    # Day off (substituted from %s).
+    substituted_label = tr("Ngày nghỉ (thay cho ngày %s)")
+
+    special_public_holidays = {
+        2010: (FEB, 19, FEB, 27),
+        2012: (JAN, 27, FEB, 4),
+        2013: (APR, 29, MAY, 4),
+        2014: (
+            (MAY, 2, APR, 26),
+            (SEP, 1, SEP, 6),
+        ),
+        2015: (
+            (JAN, 2, DEC, 27, 2014),
+            (FEB, 16, FEB, 14),
+            (APR, 29, APR, 25),
+        ),
+        2018: (DEC, 31, JAN, 5, 2019),
+        2019: (APR, 29, MAY, 4),
+        2024: (APR, 29, MAY, 4),
+    }
@@ -136,16 +136,6 @@ def _add_chinese_new_years_day_four(self, name) -> Optional[date]:
             name, self._chinese_calendar.lunar_new_year_date(self._year), days_delta=+3
         )
 
-    def _add_chinese_new_years_day_five(self, name) -> Optional[date]:
-        """
-        Add Chinese New Year's Day Five.
-
-        https://en.wikipedia.org/wiki/Chinese_New_Year
-        """
-        return self._add_chinese_calendar_holiday(
-            name, self._chinese_calendar.lunar_new_year_date(self._year), days_delta=+4
-        )
-
     def _add_qingming_festival(self, name) -> date:
         """
         Add Qingming Festival (15th day after the Spring Equinox).

@@ -14,62 +14,80 @@
 #
 msgid ""
 msgstr ""
-"Project-Id-Version: Holidays 0.58\n"
+"Project-Id-Version: Holidays 0.59\n"
 "POT-Creation-Date: 2024-09-27 15:50+0700\n"
-"PO-Revision-Date: 2024-09-27 15:50+0700\n"
-"Last-Translator: Vu Nhat Chuong <ronnyvu321@gmail.com>\n"
+"PO-Revision-Date: 2024-10-09 20:57+0300\n"
+"Last-Translator: ~Jhellico <jhellico@gmail.com>\n"
 "Language-Team: Holidays Localization Team\n"
-"Language: vi\n"
+"Language: en_US\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 "Generated-By: Lingva 5.0.4\n"
+"X-Generator: Poedit 3.5\n"
 
 #. %s (observed).
 #, c-format
 msgid "%s (nghỉ bù)"
 msgstr "%s (observed)"
 
-#. New Year's Day
+#. New Year's Day.
 msgid "Tết Dương lịch"
 msgstr "New Year's Day"
 
-#. Lunar New Year's Eve
+#. 29 of Lunar New Year.
+msgid "29 Tết"
+msgstr "29 of Lunar New Year"
+
+#. Lunar New Year's Eve.
 msgid "Giao thừa Tết Nguyên Đán"
 msgstr "Lunar New Year's Eve"
 
-#. Lunar New Year
+#. Lunar New Year.
 msgid "Tết Nguyên Đán"
 msgstr "Lunar New Year"
 
-#. Second Day of Lunar New Year
+#. Second Day of Lunar New Year.
 msgid "Mùng hai Tết Nguyên Đán"
-msgstr "The second day of Tet Holiday"
+msgstr "Second Day of Lunar New Year"
 
-#. Third Day of Lunar New Year
+#. Third Day of Lunar New Year.
 msgid "Mùng ba Tết Nguyên Đán"
-msgstr "The third day of Tet Holiday"
+msgstr "Third Day of Lunar New Year"
 
-#. Fourth Day of Lunar New Year
+#. Fourth Day of Lunar New Year.
 msgid "Mùng bốn Tết Nguyên Đán"
-msgstr "The fourth day of Tet Holiday"
+msgstr "Fourth Day of Lunar New Year"
 
-#. Fifth Day of Lunar New Year
+#. Fifth Day of Lunar New Year.
 msgid "Mùng năm Tết Nguyên Đán"
-msgstr "The fifth day of Tet Holiday"
+msgstr "Fifth Day of Lunar New Year"
+
+#. Sixth Day of Lunar New Year.
+msgid "Mùng sáu Tết Nguyên Đán"
+msgstr "Sixth Day of Lunar New Year"
 
-#. Hung Kings' Commemoration Day
+#. Hung Kings' Commemoration Day.
 msgid "Ngày Giỗ Tổ Hùng Vương"
 msgstr "Hung Kings' Commemoration Day"
 
-#. Liberation Day/Reunification Day
+#. Liberation Day/Reunification Day.
 msgid "Ngày Chiến thắng"
 msgstr "Liberation Day/Reunification Day"
 
-#. International Labor Day
+#. International Labor Day.
 msgid "Ngày Quốc tế Lao động"
 msgstr "International Labor Day"
 
-#. National Day
+#. National Day.
 msgid "Quốc khánh"
 msgstr "National Day"
+
+#. Date format (see strftime() Format Codes).
+msgid "%d/%m/%Y"
+msgstr "%m/%d/%Y"
+
+#. Day off (substituted from %s).
+#, c-format
+msgid "Ngày nghỉ (thay cho ngày %s)"
+msgstr "Day off (substituted from %s)"
@@ -14,62 +14,80 @@
 #
 msgid ""
 msgstr ""
-"Project-Id-Version: Holidays 0.58\n"
+"Project-Id-Version: Holidays 0.59\n"
 "POT-Creation-Date: 2024-09-27 15:50+0700\n"
-"PO-Revision-Date: 2024-09-27 15:50+0700\n"
-"Last-Translator: Vu Nhat Chuong <ronnyvu321@gmail.com>\n"
+"PO-Revision-Date: 2024-10-09 20:58+0300\n"
+"Last-Translator: ~Jhellico <jhellico@gmail.com>\n"
 "Language-Team: Holidays Localization Team\n"
 "Language: vi\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 "Generated-By: Lingva 5.0.4\n"
+"X-Generator: Poedit 3.5\n"
 
 #. %s (observed).
 #, c-format
 msgid "%s (nghỉ bù)"
 msgstr ""
 
-#. New Year's Day
+#. New Year's Day.
 msgid "Tết Dương lịch"
 msgstr ""
 
-#. Lunar New Year's Eve
+#. 29 of Lunar New Year.
+msgid "29 Tết"
+msgstr ""
+
+#. Lunar New Year's Eve.
 msgid "Giao thừa Tết Nguyên Đán"
 msgstr ""
 
-#. Lunar New Year
+#. Lunar New Year.
 msgid "Tết Nguyên Đán"
 msgstr ""
 
-#. Second Day of Lunar New Year
+#. Second Day of Lunar New Year.
 msgid "Mùng hai Tết Nguyên Đán"
 msgstr ""
 
-#. Third Day of Lunar New Year
+#. Third Day of Lunar New Year.
 msgid "Mùng ba Tết Nguyên Đán"
 msgstr ""
 
-#. Fourth Day of Lunar New Year
+#. Fourth Day of Lunar New Year.
 msgid "Mùng bốn Tết Nguyên Đán"
 msgstr ""
 
-#. Fifth Day of Lunar New Year
+#. Fifth Day of Lunar New Year.
 msgid "Mùng năm Tết Nguyên Đán"
 msgstr ""
 
-#. Hung Kings' Commemoration Day
+#. Sixth Day of Lunar New Year.
+msgid "Mùng sáu Tết Nguyên Đán"
+msgstr ""
+
+#. Hung Kings' Commemoration Day.
 msgid "Ngày Giỗ Tổ Hùng Vương"
 msgstr ""
 
-#. Liberation Day/Reunification Day
+#. Liberation Day/Reunification Day.
 msgid "Ngày Chiến thắng"
 msgstr ""
 
-#. International Labor Day
+#. International Labor Day.
 msgid "Ngày Quốc tế Lao động"
 msgstr ""
 
-#. National Day
+#. National Day.
 msgid "Quốc khánh"
 msgstr ""
+
+#. Date format (see strftime() Format Codes).
+msgid "%d/%m/%Y"
+msgstr ""
+
+#. Day off (substituted from %s).
+#, c-format
+msgid "Ngày nghỉ (thay cho ngày %s)"
+msgstr ""