If you want to help spread the word and help celebrate the day, here are some ideas:
1) AOO blog post: https://blogs.apache.org/OOo/entry/international_mother_language_day_2013 2) IMLD Facebook page: https://www.facebook.com/motherlanguageday 3) Facebook post on the AOO page asking the question, "How do you say 'free software' in your mother language?" : https://www.facebook.com/ApacheOO/posts/492410717484477 4) Twitter hashtag: #IMLD Regards, -Rob