Finding synonyms for commonly used words and phrases can improve your writing, making it more interesting and diverse. When it comes to describing the start of the day, there are plenty of options beyond the ubiquitous "in the morning." One could say "at dawn," "at daybreak," or "at sunrise" for a poetic touch, or go for more colloquial options like "early in the day," "morningtime," or "the crack of dawn." Other synonyms to consider could be "first thing in the morning," "in the AM," or "at the start of the day." Mixing up your phrasing can add variety and interest to your writing.