I haven't read the Bible cover to cover, but I'm quite sure there is nothing written about offering eggs for a fair weather (correct me if I'm wrong). Yet we Filipinos have a funny way of mixing superstition with religion.
I've been to Monasterio de Santa Clara several times, and always with a carton of eggs with me. It has been believed that if you offer eggs to the nuns in that monastery, there are greater chances that it wouldn't rain on your event. I tested this belief a couple of times; the first one was for our wedding. We offered more than two dozen eggs a week before the big day, and not only did it not rain, it was freaking humid! All our guests were sweating in our outdoor venue. The following time was for my daughter's first birthday. We did the same routine praying for fair weather, but that day it rained... a lot!
The monastery not only accept eggs but also other forms of donation, such as cash. And I think you can give the nuns your prayer intentions, not necessarily weather-relaated. I have some friends who went there to pray for success in their board exams, and some offer eggs for thanksgiving.
I'm not sure if it this is a joke, but I heard that the nuns use the eggs to make Leche Flan or another dessert using eggs, and sell these to the public. Well, if the profits go to some sort of charity, then I see nothing wrong with continuing this tradition. read more