We investigate the history of formation of ~400 galaxies in four Abell clusters at 0.04<z<0.1. We collect photometric (optical u, g, and r bands) and spectroscopic data from the CTIO telescope (Sheen et al. 2012) and combine them with GALEX (two ultraviolet bands) and 2MASS (near-infrared J, H, and K bands) photometric data. We fit the photometry of each galaxy using the approach developed by Pacifici et al. (2012): this consists in the bayesian analysis of the observed galaxy spectral energy distributions with a comprehensive library of synthetic spectra assembled using realistic, hierarchical star formation, and chemical enrichment histories from cosmological simulations. We constrain the star formation history of each galaxy and measure the lookback times at which the galaxies reach 50% (t_50) and 90% (t_90) of their total stellar mass. We define the "quenching" time as t_50 - t_90 and we explore correlations with stellar mass and colors for both currently star forming and quiescent galaxies. We will also explore the morphology and merger features of the observed galaxies, and will compare the findings with hydrodynamical simulations.