Sayeduna Zaid bin Arqam Radi Allahu anhu narrates the Sahabae Kiram asked the Beloved Prophet (saw) “Ya Rasool Allah, what is Qurabani?” He (saw) said, “This is the Sunnat of your father Ibraheem (Alahis Salaam).” Sahaba said, “Ya Rasool Allah, what sawaab will we get in this?” He (saw) said, “A virtue for every hair (on the animal).” The qurbani that we do on these days are very important and will inshallah bring us great reward. One hadith says "There is nothing dearer to Allah during qurbani days than sacrifice of animals. The sacrificed animals on the day of judgment will be weighted as good deeds." There are many other hadiths that tell of the rewards we get for qurbani but these were some examples. The two cards are very similar but the second one had a transparent background and the first one does not.
Eid Mubarak! Please remember me, my family, and the ummah in your blessed duas.