REMIND: Adds some uk holidays

remind/.local/share/remind/uk-hollidays.rem

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+####################
+#     New Year     #
+####################
+# New Year is always January 1st
+REM 01 Jan MSG New Year's Day
+# Although, there will be a bank holliday on the following monday if
+# new years day is on a weekend
+REM 02 Jan [YEAR(CURRENT())] THROUGH 03 Jan [YEAR(CURRENT())] SATISFY [$Uw == 1] MSG New Year's Bank Holiday
+
+
+####################
+#      Simple      #
+####################
+# Early May bank holliday is the first Monday in May
+REM Mon 1 May MSG Early May Bank Holiday
+# Spring bank holiday is the last Monday in May
+# (7 days before first Monday in June)
+REM Mon 1 Jun --7 MSG Spring Bank Holiday (Whitsun)
+# Summer bank holiday is the last Monday in May
+# (7 days before first Monday in June)
+REM Mon 1 Sep --7 MSG Summer Bank Holiday
+
+
+####################
+#      Easter      #
+####################
+# Easter is confusing, thankfully remind gives us a way to get it
+SET easter EASTERDATE(YEAR(CURRENT()))
+# Good Friday is always exactly 2 days before easter
+REM [trigger(easter-2)] MSG Good Friday
+# Easter is on easter
+REM [trigger(easter)] MSG Easter Sunday
+# Easter Monday is always 1 day after Easter
+REM [trigger(easter+1)] MSG Easter Monday
+# Mothering Sunday is always 3 weeks before easter
+REM [trigger(easter-21)] MSG Mothering Sunday
+
+
+####################
+#     Christmas    #
+####################
+# Christmas eve is always the 24th December
+REM 24 Dec MSG Christmas Eve
+# Christmas is always the 25th December
+REM 25 Dec MSG Christmas Day
+# Boxing Day is always the 26th December
+REM 26 Dec MSG Boxing Day
+# If Christmas day is on a Saturday, the following Monday and Tuesday will be
+# substitute bank holidays for Christmas and boxing day
+REM 27 Dec SATISFY [$Uw == 1] MSG Christmas Day (substitute bank holiday)
+REM 28 Dec SATISFY [$Uw == 2] MSG Boxing Day (substitute bank holiday)
+# If boxing day is a Saturday, the following Monday will be a bank holiday
+REM 28 Dec SATISFY [$Uw == 1] MSG Boxing Day (substitute bank holiday)
+# Need to look into what happens if Christmas falls on a Sunday.
+# I expect Mon and Tues are both bank holidays
+REM 27 Dec SATISFY [$Uw == 2 ] MSG Christmas Day (substitute bank holiday)
+
+
+####################
+#   Other Events   #
+####################
+REM 14 Feb MSG Valentine's Day
+# 3rd Sunday of June
+# This expression means the first Sunday after or on 15th June
+REM Sun 15 Jun MSG Father's Day
+
+####################
+# Daylight Savings #
+####################
+# British summer time starts on the last Sunday of March
+REM Sun 1 Apr --7 MSG %"Clocks Forward%" British Summer Time Starts
+# British summer time ends on the last Sunday of October
+REM Sun 1 Nov --7 MSG %"Clocks Backward%" British Summer Time Ends