MONDAY MAR 1

Chocolate Fools Day at the Westin Hotel, Copley. 661-6384. 1-3:30 p.m. $20 in advance, $25 at the door.

"Fragile Families and Child Well-Being." Lecture by Sarah McLanahan, Princeton University. Taubman Dining Room, KSG. 12:30 p.m. FREE.

Want to experience New Year's Eve all over again? "Chinese New Year '99: Brilliant Spring," a celebratory performance by the Boston Chinese Performing Arts Association. Sanders Theatre. 7:30 p.m. Tickets $15, $20, $25, $30 and $50.

The Hasty Pudding did not invent the concept of men dressed as women on stage. Find out who did. "Two Centuries of Performing Ancient Greek Drama: Heritage and Innovation on the Greek Stage," a lecture by Platon Mavromoustakos, University of Athens. Barker Center, Room 024. 4:15 p.m. FREE.

Have some art with your beer. Pauline Lim's collection of paintings, "The Time I Dreamt in Full Color," is on display for its final week at Union Square Bistro. 16 Bow St., Somerville. 5 to 10 p.m. FREE.

"Mary Cassatt: Modern Woman," at the MFA. See Thursday listing for details.

In case you're not a biochemistry major, you now have a legitimate reason to hang out in Cabot Library. "A History of the Harvard Science Review" presents scientific topics and issues as discussed by the Harvard Science Review, Harvard's oldest student-run science publication. Cabot Science Library. Through April. FREE.

Hot Australian guys surfing. This is real art? Tracy Moffat: Free Falling, at the Institute of Contemporary Art, through March 14th. 955 Boylston St, Boston. Open Wednesday through Sunday, noon to 5 p.m. Thursdays until 9 p.m. Admission $3.25 for students.

Legal philosophy from New York. "A Talk by Ronald Dworkin," at the Harvard Law School. Ronald Dworkin, NYU Law School and Oxford University. Hauser Hall, Room 105, Harvard Law School. 4 p.m. FREE.

Just how many ways are there to die? "Variations on a King's Death: A Study of Different Accounts of Henry II Plantagenet's Death," a lecture given by Virginia Green of Harvard. Barker Center, Room 133. 4:15 p.m. FREE.

"Gormlaith" is not in the dictionary. Wonder what it is? "A Trio of Gormlaiths in Literature and History," a lecture by M'ire Ni Mhaonaigh. Barker Center, Room 114. 4:30 p.m. FREE.

"Alaska: Spirit of the Wild" opens at the IMAX theater in the Museum of Science. Showing daily at 10 a.m., 1 p.m., 3, 6, 8 and 10 p.m. $7.50 for adults.

"Millennium Conversations: A Spirited Dialogue on Community Change," a panel discussion at the Museum of Afro-American History. Panelists include the Rev. Ray Hammond, Marian Heard, Jackie Jenkins Scott, Matt Storin, Anna Faith Jones and Ralph Martin. 8 Smith Ct., Beacon Hill. 6 p.m. Suggested admission donation is $5.