Which of the following is true about the date of Caesar's assassination?

The date of Julius Caesar's assassination is widely recognized to be March 15, 44 BC, a date also known as the Ides of March. This event occurred in the spring season, as March marks the beginning of spring in the Roman calendar. The imposition of this date has significant historical importance, as it led to a series of power struggles and ultimately contributed to the end of the Roman Republic, transitioning towards the rise of the Roman Empire.

While it is true that many significant events in Roman history had seasonal implications, the specific choice of March 15 aligns clearly with the spring season, confirming why it is the correct answer. The other options do not hold true in the context of Caesar's assassination, as the events took place in spring, not in winter or on the last day of the month, and while his assassination did contribute to the end of the Roman Republic, that is not strictly a statement about the date itself.