In the bischalcone molecule of the title compound, C24H18O4 ·2C3H7NO, the central benzene and terminal hydroxyphenyl rings form a dihedral angle of 14.28(11)° and the central C=C double bond adopts a trans configuration. In the crystal, the bischalcone and solvate molecules are interconnected via O-H O hydrogen bonds, which were investigated by Hirshfeld surface analysis. Solid-state fluorescence was measured at λex = 4400Å. The emission wavelength appeared at 5510Å, which corresponds to yellow light and the solid-state fluorescence quantum yield (F f) is 0.18. © 2018 International Union of Crystallography. All rights reserved.