The gates of Paradise are opened in Ramadan

عَنْ أَبِي هُرَيْرَةَ رضى اللّٰہ عنه أَنَّ رَسُولَ اللَّهِ صلّى اللّٰہ عليه وسلّم قَالَ: إِذَا جَاءَ رَمَضَانُ فُتِحَتْ أَبْوَابُ الْجَنَّةِ.‏

Hazrat Abu Hurairah^ra narrated: 

“Allah’s Messenger^sa said: ‘When Ramadan comes, the gates of Paradise are opened.’”

(Sahih al-Bukhari, Kitab as-sawm, Bab hal yuqalu ramadan aw shahru ramadan wa mun ra’a kullahu wasi‘an, Hadith 1898)