Veni, Vidi, VISA

$ autoload -U age

# files modified today

 $ print *(e:age today now:)             

# files modified since 5 pm

 $ print *(e-age 17:00 now-)             

# ... since 5 o'clock yesterda

 $ print *(e-age yesterday,17:00 now-)

# ... from last Christmas before today

 $ print *(e-age 2006/12/25 today-)

# ... before yesterday

 $ print *(e-age 1970/01/01 yesterday-) 

# all files modified between the start of those dates

 $ print *(e:age 2006/10/04 2006/10/09:) 

# # all files modified on that date

 $ print *(e:age 2006/10/04:) 

# Supply times.

 $ print *(e-age 2006/10/04:10:15 2006/10/04:10:45-)

$ autoload -U is-at-least

$ FOO=42

$ is-at-least 23 $FOO && echo 'If you can read this, you are too close.'

If you can read this, you are too close.