This Dua should be recited when the sun rises:

اَلْحَمْدُ لِلَّهِ الَّذِيْ أَقَالَنَا يَوْمَنَا هٰذَا وَلَمْ يُهْلِكْنَا بِذُنُوْبِنَا

Alhamdu lillaahil-ladhi aqaalanaa yawmanaa hadhaa wa-lam yuh-liknaa bi-dhunubinaa

All praise (and innumerable thanks) to Allah, Who has shown us this day, and did not destroy us for our (past) sins.

Reference: Muslim: 822