Yesteryear

[Agnes]

Years ago, not last year, as you would assume from the meaning of yesterday. its much more general. Middle English, not really in use nowadays.

[Lanell]

A word meaning last year.
[Yester] can also be put in front of other words.
Ex. [Yesteryear]
Yestermonth
Yesterday
[Yestertime]
Yesterhour
etc.

[Little_Girl]

Last year or the recent past, especially as nostalgically recalled.

[Sommer]

a time in the past: