Rasūlullāh sallallāhu 'alayhi wasallam used to make du'ā in Rajab to be given the opportunity to live until Ramadhān. Having already seen Allāh ta'ālā during the night of mi'rāj, it is beyond imagination how much desire he had to leave this world and meet Allāh ta'ālā.
Despite this, when he would find himself only two months away from the blessed month of Ramadhān, he would desire to be given leave in this world in order to benefit from the innumerable bounties and blessings of Ramadhān. This should help us understand the extraordinary nature of the blessings of Ramadhān and encourage us to yearn for it and benefit from it.