Add shabbos mevorchim method

test/test_jewish_calendar.py

@@ -598,6 +598,16 @@ def test_is_taanis_bechorim_for_nonstandard_year(self):
         expected = ['1-12']
         self.assertEqual(all_days, expected)
 
+    def test_is_shabbos_mevorchim(self):
+        year = test.test_helper.leap_shabbos_shelaimim()
+
+        all_days = test.test_helper.all_days_matching(year, lambda c: c.is_shabbos_mevorchim()).values()
+        all_days = [item for sublist in all_days for item in sublist]  # flatten
+        expected = ['7-29', '8-27', '9-25', '10-23',
+                    '11-29', '12-27', '13-25', '1-24',
+                    '2-29', '3-28', '4-26', '5-25']
+        self.assertEqual(all_days, expected)
+
     def test_is_rosh_chodesh(self):
         year = test.test_helper.leap_shabbos_shelaimim()
 

zmanim/hebrew_calendar/jewish_calendar.py

@@ -93,6 +93,9 @@ def is_taanis_bechorim(self) -> bool:
         return ((self.day_of_week != 7 and self.jewish_day == 14 and self.jewish_month == 1) or
                 (self.day_of_week == 5 and self.jewish_day == 12 and self.jewish_month == 1))
 
+    def is_shabbos_mevorchim(self) -> bool:
+        return self.day_of_week == 7 and self.jewish_month != 6 and self.jewish_day in range(23, 30)
+
     def is_rosh_chodesh(self) -> bool:
         return self.jewish_day == 30 or (self.jewish_day == 1 and self.jewish_month != 7)