This Application / Book is define about Rabi Al Awwal
Rabi' al-awwal (ربيع الأوّل) is the third month in the Islamic calendar. During this month, majority of the Muslims celebrate Mawlid - the birthday of the Islamic prophet Muhammad. Sunni Muslims believe the exact date of birth of Muhammad to have been on the twelfth of this month, whereas Shi'a Muslims believe him to have been born on the dawn of the seventeenth day. The name Rabī‘ al-awwal means the first [month] or beginning of spring, referring to its position in the pre-Islamic Arabian calendar. Hence this is considered to be a very blessed month.
The word "Rabi" means "spring" and Al-awwal means "the first" in Arabic language, so "Rabi' al-awwal" means "the first spring" in Arabic language. The names seems to have to do with the celebration events in the month as "spring" is the end to winter (symbol of sadness) and consequently the start of happiness. The Arabic calendar being lunar calendar, the month is naturally rotating over years and Rabī‘ al-awwal can be in spring or any other season every now and then, so the meaning can not be related to the actual season.