What to say when something that pleases you happens
1 supplication
English translation of the meaning, for guidance: the Arabic text is authoritative.
((كَانَ النَّبيُّ صلى الله عليه وسلم إِذَا أَتَاهُ أَمْرٌ يَسُرُّهُ أَوْ يُسَرُّ بِهِ خَرَّ سَاجِداً شُكْراً لِلَّهِ تَبَارَكَ وَتَعَالَى)).
(The Prophet PBUH would prostrate in gratitude to Allah upon receiving news which pleased him or which caused pleasure. )