dawn [dawns](morning twilight period) noun [UK: dɔːn] [US: ˈdɒn]The accident occurred at dawn. = El accidente ocurrió de madrugada.
midnight(middle of the night) noun [UK: ˈmɪd.naɪt] [US: ˈmɪd.ˌnaɪt]
morning [mornings](the part of the day after midnight and before midday) noun [UK: ˈmɔːn.ɪŋ] [US: ˈmɔːrn.ɪŋ]It's four in the morning. = Son las cuatro de la madrugada.