day lark
rise with the lark
nighthawk
early bird
night owl
night person
bright and early
get up with the chickens
matitudinal
matutinal
at all hours
rathe
ack emma
first thing
matutinally
early-morning hour
early riser
morning person
antemeridian
early to bed, early to rise, makes a man healthy, wealthy and wise
oh dark thirty
lark
small hours
sunriser
wee small hours
morning
up with the lark
matinal
up with the chickens
morningness
sunshine
forenoon
matutine
tomorning
oh dark hundred
ante meridiem
wee hours
sparrow-fart
tomorn
go to bed with the chickens
go to bed with the sun
break
seminocturnal
waker
burn the candle at both ends
get up early
late riser
gloaming
keep good hours
morn