Bright and early
Definition 1 of 1
Pro Tip 1/3Sunny Disposition
The phrase often implies someone is not just up early but also in a good, energetic mood. 
Even at 5 AM, she was bright and early, humming a cheerful tune.
Pro Tip 2/3Not Literal
'Bright' doesn't necessarily mean sunlight is present; it refers to time, suggesting the start of the day. 
In winter, she rises bright and early when it's still dark outside.
Pro Tip 3/3Positive Connotation
Using 'bright and early' generally reflects a positive attitude towards the early start. 
We'll get a head start on the road trip by leaving bright and early!