photo/cathleen maclearie

Ring in the new year — for trees

See the forest for the trees this week. Tu B’Shevat, the environmental holiday also known as Jewish Arbor Day or the New Year of the Trees, is being observed across the Bay Area. Activities include fruit tastings, a beach cleanup, a nature walk, discussions, exhibits about ecological sustainability, and seders for children, adults and families. The holiday starts the evening of Tuesday, Feb. 7, but the celebrations are happening all week long.

sunday/5

Mah jongg. Includes potluck brunch. At Afikomen Judaica, 3042 Claremont Ave., Berkeley. 11 a.m. $15. www.mahjonggforeveryone.com.

monday/6

B’hootz intro night. Informational session about Wilderness Torah’s new program for children. At JCC East Bay, 1414 Walnut St., Berkeley. 7 p.m. Free. www.jcceastbay.org.

tuesday/7

Preschool open house. At Temple Emanu-El, 1010 University Ave., San Jose. 5 p.m. Free. www.templesanjose.org.

thursday/9

South Bay Teen Idol Semifinals. Vocalists compete for the top three scholarships. Proceeds benefit the Addison-Penzak JCC. At JCC, 14855 Oka Road, Los Gatos. 6:30 p.m. Free. www.svjcc.org.

saturday/11

Second Saturday. S.F.-based Jewish Community Federation presents a social night for Jewish young adults. At the Cellar, 685 Sutter St., S.F. 8 p.m. $15. www.cellarsf.com.

sunday/12

Golden Gate Warriors Jewish Heritage Night. Game against Houston Rockets. At Oracle Arena, 7000 Coliseum Way, Oakland. 6 p.m. Prices vary. http://bit.ly/yf7bdq.

Super Sunday. Volunteers with the Jewish Federation of Silicon Valley make calls to raise money to support local and international Jewish agencies. At Addison-Penzak JCC, 14855 Oka Road, Los Gatos. 9 a.m. to 6 p.m. www.jvalley.org.