[Remind-Fans] Unnecessary "baggage" in Labor Day reminder in holidays.rem?

[Jonathan Kamens]

My holidays.rem which I snarfed from somewhere semi-official long, long
ago has this in it:

SET  Week_1              1
...
FSET _back(days)        TRIGGER(TODAY()-days)
FSET _trig()            TRIGGER(TRIGDATE())
...
REM  Mon Sep [Week_1]   SCANFROM [_back(7)] SATISFY 1
                        OMIT [_trig()] MSG %"Labor Day%"%

This simpler version seems to calculate Labor Day on exactly the same dates:

SET  Week_1              1
...
FSET _back(days)        TRIGGER(TODAY()-days)
...
REM  Mon Sep [Week_1]   SCANFROM [_back(7)] MSG %"Labor Day%"%

So does this even simpler version:

REM  Mon Sep 1 MSG %"Labor Day%"%

I'm trying to understand what all the extra baggage (SCANFROM, SATISFY
1, OMIT [_trig()]) is there fore.

Why do I care? Because, separately, I have something in my own reminders
to show me candle-lighting time for the first night of Rosh Hashanah:

SET Shabbat_Lead 18
FSET hd(d,m) HEBDATE(d,m)
FSET yomtovlight(d,m) IIF((WKDAYNUM(hd(d,m)-1) == 6) || \
			  ((WKDAYNUM(hd(d,m)-1) != 5) && \
			   (d==2 || d==16 || d==23 || (d==22 && m=="Nisan") || \
			    d==7)), \
			  TRIGGER(hd(d,m)-1,sunset(hd(d,m)-1)+42), \
			  TRIGGER(hd(d,m)-1,sunset(hd(d,m)-1)-Shabbat_Lead))
REM [yomtovlight(1, "Tishrey")] OMIT Fri Sat SKIP MSG %"Candles%" %2%

It malfunctioned this year and didn't put the candle-lighting time on my
calendar, I think because Erev Rosh Hashanah was Labor Day and therefore
the SKIP my rule caused the reminder to be omitted because of the OMIT
[_trig()] in the Labor Day rule. That's just a guess, though; honestly I
don't fully understand all this stuff hangs together.

Thanks,

jik


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