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+#!/usr/bin/python3
+
+'''
+
+Week 187:
+
+    https://theweeklychallenge.org/blog/perl-weekly-challenge-187
+
+Task #1: Days Together
+
+    Two friends, Foo and Bar gone on holidays seperately to the same
+    city. You are given their schedule i.e. start date and end date.
+
+    To keep the task simple, the date is in the form 'DD-MM' and all
+    dates belong to the  same calendar year i.e. between '01-01' and
+    '31-12'.
+
+    Also the year is non-leap year and both dates are inclusive.
+
+'''
+
+import unittest
+from datetime import date, timedelta
+
+def _date(dateStr) -> date:
+    (day, month) = dateStr.split("-")
+    return date(2022, int(month), int(day))
+
+def _days_together(fromDate, toDate, _toDate) -> int:
+    if toDate > _toDate:
+        toDate = _toDate
+
+    delta = toDate - fromDate
+    return delta.days + 1
+
+def daysTogether(sd1, ed1, sd2, ed2) -> int:
+    _sd1 = _date(sd1)
+    _ed1 = _date(ed1)
+    _sd2 = _date(sd2)
+    _ed2 = _date(ed2)
+
+    days = 0
+
+    if _ed1 < _sd2:
+        return days
+
+    if _sd2 <= _sd1:
+        days = _days_together(_sd1, _ed1, _ed2)
+    elif _sd2 <= _ed2:
+        days = _days_together(_sd2, _ed1, _ed2)
+
+    return days
+
+#
+#
+# Unit test class
+
+class TestDaysTogether(unittest.TestCase):
+    def test_daysTogether(self):
+        self.assertEqual(daysTogether('12-01','20-01','15-01','18-01'), 4)
+        self.assertEqual(daysTogether('02-03','12-03','13-03','14-03'), 0)
+        self.assertEqual(daysTogether('02-03','12-03','11-03','15-03'), 2)
+        self.assertEqual(daysTogether('30-03','05-04','28-03','02-04'), 4)
+
+unittest.main()