go to bed with the chickens
go to bed with the sun
get up with the chickens
wee
ultraearly
at all hours
rise with the lark
soon
earlily
airly
up with the lark
prebedtime
up with the chickens
beauty sleep
burn the candle at both ends
early-morning hour
earlyish
arousal
bright and early
morning
postmidnight
European morning
premidnight
sparrow-fart
matutinal
daw
steal a march
matitudinal
lucifugous
first thing
aurorally
oh dark hundred
oh dark thirty
rathe
sleepward
rear
sleepytime
break
morrow
foredawn
premorning
ack emma
matutinally
morn
turn flukes
sleep late
get up early
early bird
sleep in
presleep
early to bed, early to rise, makes a man healthy, wealthy and wise
in time
go out like a light
antelucan
dawntime
dreamward
predawn
retire
go to bed
wee small hours
turn in
call it a night
crawl in
bed
ante meridiem
hit the hay
hit the sack
bye-bye
sack out
kip down
midforenoon
small hours
go to sleep
sleepy
early night
sleepyheaded
tomorn
sleepy-eyed
oversleep
hit the rack
cop off
tomorning
ahead of time
bunk down
overnap
wee hours
hit the sheets
micronap
early riser
bed down