The Messenger of Allah (may Allah bless him and grant him peace) said:
“Verily, Allah extends His hand out at night in order to accept the repentance of the sinner by day. And He extends His hand out during the day in order to accept the repentance of the sinner by night, until (the day) when the sun will rise from its west”
[Muslim]
Was Salam
Jashim
Islamopedia 