The word of the day is

DIURNAL

-adj.

1.Of or pertaining to a day or each day; daily.

2.Of or belonging to the daytime (opposed to nocturnal).

3.Bot. showing a periodic alteration of condition with day and night,as certain flowers that open by day and close by night.

4. Active by day,as certain birds and insects (opposed to nocturnal)

-n.

1. Liturgy,a service book containing offices for the daily hours of prayer.

2. Archaic,a diary.

3. Archaic,a newspaper,esp. a daily one.

The analogy of the day is 

QUILT:WARM::Sprinter:Fast