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.
Holiday
2020
2021
2022
Chinese New Year
25 Jan
12 Feb
21 Jan
Mawlid al-Nabi / Prophetâ€s Birthday
29 Oct
18 Oct
9 Oct
Western Roman Easter
12 Apr
4 Apr
17 Apr
Eastern Orthodox Easter / Pasha
19 Apr
2 May
24 Apr
Passover / Pesah
9-15 Apr
28 Mar-8 Apr
31 Mar-7 Apr
Cinco de Mayo
5 May
Start of Ramadan / Month of Fasting
13 Apr
3 Apr
Eid-al-Fitr / Festival of Fast Breaking
24-26 May
14-16 May
2-3 May
Rosh Hashanah
19-20 Sep
6-7 Sep
26-27 Oct
Eid-al-Adha / Festival of Sacrifice
31 Jul-3 Aug
20-23 Jul
9-10 Jul
Muharram / Islamic New Year
20 Aug
10 Aug
31 jul
Chanukkah or Hanukkah
11-18 Dec
29 Nov- 6 Dec
18-25 Dec
Christmas
25 Dec
Here are some pages I got off the internet about sizes and dates for special occasions using goat meat and lamb. For your information.