Wrong recurrence handling

[arzzcom]

• PHP Version: 7.2.15
• PHP date.timezone: Asia/Seoul
• ICS Parser Version: 2.1.9
• Linux

RRULE is FREQ=MONTHLY;INTERVAL=1;BYDAY=MO,TU,WE,TH,FR;BYSETPOS=1

It means every month's first day but not the weekend (SU, SA).
2019-05-01 is Wednesday so this rule refers to 2019-05-01.
2019-06-01 is Saturday so this rule refers to 2019-06-03.
However, this rule refers to every Monday of each month.

And

RRULE is FREQ=MONTHLY;INTERVAL=1;BYDAY=SU,MO,TU,WE,TH,FR,SA;BYSETPOS=-1

It means every month's last day like this 2019-04-30, 2019-05-31.
However, this rule refers to the last Saturday of each month.

[u01jmg3]

• In branch issue-212 I have attempted to fix the two rules you mention in this issue - let me know what you think.

---

• Note this does not tackle more complicated rules such as the following as I am limited to relative date formats unless a large proportion of the parser is rewritten to use something other than strtotime().
  • FREQ=MONTHLY;BYDAY=WE,FR;BYSETPOS=3;COUNT=5
    • BYDAY=WE,FR;BYSETPOS=3

[u01jmg3]

@arzzcom: are you able to test the code I have written to fix this issue?

[arzzcom]

@u01jmg3 Sorry! I'm late. I'll test now. :)

[arzzcom]

@u01jmg3 It works! Thanks.
But RRULE:FREQ=MONTHLY;INTERVAL=1 is not working without BYMONTHDAY it follows the origin event's date.

[u01jmg3]

Thanks for testing, will look at RRULE:FREQ=MONTHLY;INTERVAL=1 in a new issue (#221)