HAMDEN \u2014 Selichot, a service of preparation for Judaism\u2019s High Holy Days, will be held Saturday at Congregation Mishkan Israel. Rabbi Brian Immerman, spiritual leader of Mishkan Israel, said Thursday that the service, held on the Saturday before Rosh Hashana, is part of the month of the month of Elul, which traditionally \u201cis a time of introspection.\u201d \u201cIt\u2019s the first time during the High Holy Days season that we come together as a community to ask for forgiveness for our communal transgressions,\u201d he said. Rosh Hashana, the two-day Jewish new year \u2014 this year will be the Hebrew year 5779 \u2014 begins at sundown on Sept. 9 and ends at sundown Sept. 11. The High Holy Days conclude with Yom Kippur on Sept. 18 and 19. \u201cA lot of times we think of the High Holy Days as being the event,\u201d Immerman said. \u201cAnd traditionally in Judaism there\u2019s a lot of work that goes into preparing for the High Holy Days, so that you\u2019ve taken stock of who we were and what we did in the last year \u2026 so we\u2019re not asking those questions of ourselves for the first time\u201d at Rosh Hashana. In addition to \u201ctaking account of the soul\u201d for the past year, \u201cwe think about who we want to be in the year to come,\u201d he said. Three other Reform congregations will join Mishkan Israel for the service: Temple Emanuel in Orange, Temple Beth David in Cheshire and B\u2019nai Israel in Southbury. The service will begin at 7 p.m. Mishkan Israel is at 785 Ridge Road.