Here are some places to look for holidays for use of goat and lamb.

https://www.sheepandgoat.com/ethniccalendar

https://extension.psu.edu/marketing-lamb-and-goat-for-holidays

https://content.ces.ncsu.edu/consider-breeding-your-does-to-target-ethnic-holidays

http://www.pagosasun.com/extension-viewpoints-marketing-lambs-and-goats-by-the-2021-ethnic-holiday-calendar/  This tell size and sex of animals needed.

Ethnic Holiday Calendar  Below is some info I found.  Google goat meat, ethnic holidays and see what you find to hit best market times.

Here are some pages I got off the internet about sizes and dates for special occasions using goat meat and lamb.  For your information. 

Muslim holidays want blemish free - no castrated, no broken horns yearling preferred for Festival of Sacrifice.  some older accepted.

Islamic New Year -preferably Mutton - no special wt.

Ramadan- weaned but have all milk teeth.  Lambs 60-80  Goats 60 preferred 40 - 120 acceptable.

End of Ramadan 60-80# lambs  60# goats

Birth of Prophet- no size recommendation

Passover- Milk fed Lambs 30-55#

Rosh Hashanah front quarter lambs weighing 60-100#

Chanukkah - Kosher slaughter young milk fed lambs and kids

Western roman Easter - Lambs milk fed 30-45# goats 20-40 milk fed

Orthodox Easter Lambs 40-55# Goats 25-50# milk fed

Thanksgiving & Christmas depends on ethnic group

Hispanic market prefers 20-35# milk fed kids for cabrito and larger for Seco De Chivo or Cinco De Mayo cabrito and larger goats.

Caribbean Holidays in month of August prefer larger goats

4th of July cabrito kids with 1 or no adult teeth

Chinese market 60-80 live wt and good health goats

Sometimes I think we wait to get more weight and we would do better selling them younger IF we hit these special holidays.