We don't recognize the days that shape our lives until the moment has passed. They're just days, like any other day, unless some unexpected something comes along with such overbearing force that a particular day becomes seared in our memory — where we were, what we were doing — and suddenly takes on an otherworldly significance.

Bobby is a film about such a day. What writer/director Emilio Estevez attempts to do here is present June 4, 1968 as just another day that happens to culminate with the assassination of Robert F. Kennedy. It all takes place at the Ambassador Hotel, where Kennedy would be mortally wounded before the day's end, and focuses on the ordinary travails of staff members and guests at the Ambassador that fateful day. It's an ambitious, if uneven, effort that teeters between melodrama and significance.

At its worst, Bobby plays like a cross between The Love Boat and Crash. The ensemble cast, featuring Anthony Hopkins, Sharon Stone, William H. Macy, Lindsay Lohan, Harry Belafonte, Laurence Fishburne, Christian Slater, Elijah Wood, Demi Moore, Freddie Rodriguez, Ashton Kutcher, and a host of other rising and fading stars, often distracts from the intent of the film. Their substories are mostly banal — the alcoholic diva (Demi Moore) and her cuckolded husband (Emilio Estevez), the philandering hotel manager (Macy) and his silently suffering hairdresser wife (Stone), the reminiscing hotel retirees (Hopkins and Belafonte) — and don't add to the weight to which the film strives. They serve more as counterpoint to the more interesting stories interspersed with them. Lindsay Lohan is surprisingly good as an idealistic girl marrying Elijah Wood to keep him from having to serve in Vietnam. Martin Sheen and Helen Hunt portray aging liberal socialites representing the passing of more civilized culture, and the interaction between Fishburne and Rodriguez are quiet testaments to the evolving socio-racial awareness among minorities.

The first third of Bobby establishes all these characters and their stories, and it's a bit haphazard at first, more a game of "spot the star" than anything else. But as the film progresses, their stories intertwine in remarkably subtle ways that reflect the timbre of the times. Kennedy himself is more metaphor than character through most of the movie, with archival footage of him punctuating the film's main point of how a single moment can alter the shape of a society.

When it works — which it mostly does, once the establishing sequences are out of the way -- Bobby is a compelling statement. Estevez doesn't dwell on conspiracy theories or political machinations. By taking the sociopolitical climate of 1968 and viewing it through the eyes of people unaware they were microcosms of the upheaval taking place all around them, he makes the assassination of Robert Kennedy deeply personal and moving. When he was killed, the dreams of many Americans for a more tolerant society were all but shattered. Yet, the senselessness of it, coming so soon after the assassination of Martin Luther King, united us in some ways, if even for a short time.

As a film, Bobby sometimes overreaches its ambitions. But as a snapshot of American life and how we viewed ourselves on the day that RFK was shot, it's a powerful achievement. The DVD release has special features that enhance its significance, including a "making of" documentary and eyewitness accounts by people who were there the night it happened. It's not a masterpiece, but it is a movie that stands repeating viewings.