• March for Babies, May 10. Join Boston Parents Paper in walking to help raise money to fund research to prevent premature births, birth defects and infant mortality. 508-366-9066; marchofdimes.com.
• Astronomy Day, May 10. Largest public astronomy event in greater Boston. Free admission. Clay Center Observatory, Dexter Southfield, 20 Newton St., Brookline; claycenter.org.
• Duckling Day Parade, May 11. A beloved annual Mother’s Day event celebrating the children’s story Make Way for Ducklings. Dress as your favorite character and join the parade around Boston Common. friendsofthepublicgarden.org.
