古今

Noun

 * 1) ancient and modern; past and present; then and now

Etymology 1
From.

The  reading, so likely a later borrowing.

Noun

 * 1) the past and present
 * : a style of hinamatsuri doll from the late Edo period

Proper noun

 * : a waka anthology compiled in 905

Etymology 2
From.

Uses the  reading for the latter kanji, suggesting an older borrowing.

Noun

 * 1) the past and present
 * 2) old and new
 * 3) the interval between the past and present; also, such a history

Etymology 3
Compound of.

Noun

 * 1) the past and present