Here is a routine to calculate the exact date of Easter for any given year based on the FAQ by Claus Tøndering at http://www.tondering.dk/claus/cal/node3.html#SECTION003130000000000000000. Mind, it is only valid for Gregorian Calendars and stores all dates for Western Chrisianity holidays related to Easter into AstDB. It takes some time to calculate and store all data. Therefore, its not a great idea to invoke the macro on any call. Though the routine is using GMT for the calculation it can be used in any timezone. The variable 'easter' holds the date of Easter Sunday in EPOCH format. Use the STRFTIME function to reformat it to any desired format.

[macro-calceaster] ; ARG1 = year (optional)
exten => s,1,Set(year=${ARG1})
exten => s,n,GotoIf($[0${year}>0]?skip)
exten => s,n,Set(year=${STRFTIME(||%G)})
exten => s,n(skip),Set(G=${MATH(${year}%19|i)})
exten => s,n,Set(C=${MATH(${year}/100|i)})
exten => s,n,Set(H=${MATH(${MATH(${MATH(${MATH(${MATH(${C}-${MATH(${C}/4|i)}|i)}-${MATH(${MATH(${MATH(${C}*8|i)}+13|i)}/25|i)}|i)}+${MATH(${G}*19|i)}|i)}+15|i)}%30|i)})
exten => s,n,Set(I=${MATH(${H}-${MATH(${MATH(${MATH(${H}/28|i)}*${MATH(1-${MATH(29/${MATH(${H}+1|i)}|i)}|i)}|i)}*${MATH(${MATH(21-${G}|i)}/11|i)}|i)}|i)})
exten => s,n,Set(J=${MATH(${MATH(${MATH(${MATH(${MATH(${MATH(${MATH(${year}/4|i)}+${year}|i)}+${I}|i)}+2|i)}-${C}|i)}+${MATH(${C}/4|i)}|i)}%7|i)})
exten => s,n,Set(L=${MATH(${I}-${J}|i)})
exten => s,n,Set(M=${MATH(${MATH(${MATH(${L}+40|i)}/44|i)}+3|i)})
exten => s,n,Set(easter=${STRPTIME(${year}${M}${MATH(${MATH(28-${MATH(${MATH(${M}/4|i)}*31|i)}|i)}+${L}|i)}|GMT|%Y%m%d)})

exten => s,n,Set(DB(holidays/${STRFTIME(${MATH(${easter}-${MATH(2*86400)})}|GMT|%G%m%d)})=Good Friday)
exten => s,n,Set(DB(holidays/${STRFTIME(${MATH(${easter}+${MATH(1*86400)})}|GMT|%G%m%d)})=Easter Monday)
exten => s,n,Set(DB(holidays/${STRFTIME(${MATH(${easter}+${MATH(39*86400)})}|GMT|%G%m%d)})=Ascension Day)
exten => s,n,Set(DB(holidays/${STRFTIME(${MATH(${easter}+${MATH(50*86400)})}|GMT|%G%m%d)})=Pentecost Monday)

Hi

I'm using the following macro to check whether today is a holiday or not:

--
[macro-if-holiday]
exten => s,1,NoOp(Checking if today is a holiday)
exten => s,n,Set(YEAR=${STRFTIME(${EPOCH},,%Y)})
exten => s,n,Set(MONTHDAY=${STRFTIME(${EPOCH},,%m%d)})
exten => s,n,NoOp(Today's date is ${YEAR}${MONTHDAY})
exten => s,n,GotoIf(${DB_EXISTS(HOLIDAYS/${MONTHDAY})}?s-FIXED,1)
exten => s,n,GotoIf(${DB_EXISTS(HOLIDAYS/${YEAR}${MONTHDAY})}?s-MOVING,1)
exten => s,n,NoOp(* Today is NOT a holiday)
exten => s,n,Goto(${ARG4},${ARG5},${ARG6})

exten => s-FIXED,1,NoOp(* Today is a FIXED holiday: ${MONTHDAY} ${DB(HOLIDAYS/${MONTHDAY})})
exten => s-FIXED,n,Goto(${ARG1},${ARG2},${ARG3})

exten => s-MOVING,1,NoOp(* Today is a MOVING holiday: ${YEAR}${MONTHDAY} ${DB(HOLIDAYS/${YEAR}${MONTHDAY})})
exten => s-MOVING,n,Goto(${ARG1},${ARG2},${ARG3})
--

More info on my blog here: http://www.bisente.com/blog/2007/04/30/asterisk-holidays/?lan=english

It's astdb-based, so it is completely dynamic and doesn't have any dependency (cron, shell scripts, etc.) outside Asterisk itself.

I am running Asterisk 1.0.7 (Debian sarge) and it seems that specifying a range for months does not work. (it works for weekdays and time)

If I set up something like:

GotoIfTime("Zap/1-1", "08:00-11:00|sat|*|oct-dec?incoming-emerg|s|1")

this goto statemente is executed only on October and December, and NOT on November.

Here is a page which gives a better view on determining the date Easter will fall on. I'm sure someone could whip up something using AGI to use this formula so it can be used in Asterisk ... :)

http://www.openofficetips.com/blog/archives/2005/03/easter_formula.html

Undrhil

exten => s,1,GotoIfTime(*|mon|*|*?open,s,1)
exten => s,2,GotoIfTime(*|wed|*|*?open,s,1)
exten => s,3,GotoIfTime(*|fri|*|*?open,s,1)
exten => s,4,Goto(closed,s,1)

How can I set a rule for monday, wednesday and friday?

If I wanted to set a rule for a holiday (for instance Labor Day in USA which occurs on the first Monday of September), could I do something like this?:

GotoIfTime(*|mon|1-7|September?holiday,s,1)

It would only match if it's the first Monday of September, I would think. Or would that just confuse the parser?

disregard this...

The problem was related to something totally unrelated to *

I use this command to "insert" an office closed message in our initial welcome prompt. However, there is a noticeable delay between playing sound files as the parser tries to figure out the boolean value of the time setting. Why does it take a good 2 seconds to parse this on a p3 800?