From here.

• daybreak
• morning
• high noon
• afternoon
• evening
• sundown
• twilight
• prime time
• spring
• summer
• autumn
• winter
• primordial
• historic
• modern
• deadline
• schedule
• tea time
• fashionably late
• early
• recently
• timeless
• hourglass
• bedtime
• countdown
• "for the last time..."
• give me a moment
• it's about time
• what took you so long?
• time's up