Can you sole this Riddle?: What is seen in the middle of march and April that cant be seen at the beginning or end of either month

Read the excerpt from julius caesar, act 5, scene 5. brutus. why this, volumnius. the ghost of caesar hath appeared to me two several times by night—at sardis once, and this last night, here in philippi fields. i know my hour is come. volumnius. not so, my lord. brutus. nay, i am sure it is, volumnius. thou seest the world, volumnius, how it goes. our enemies have beat us to the pit, [low alarums] it is more worthy to leap in ourselves than tarry till they push us. which prediction about the plot does this passage most support? brutus will replace caesar. brutus will take his own life. brutus will surrender to his enemies. brutus will be forever haunted by caesar.

Ican’t find this question here can y’all tell me the awnser?

How does the author foreshadow trouble in the prison? support your answer with explicit textual evidence.