Laudator Temporis Acti

Carmina Burana 75 (tr. Helen Waddell):

Let's away with study,
    Folly's sweet.
Treasure all the pleasure
    Of our youth:
Time enough for age        5
    To think on Truth.
So short a day,
And life so quickly hasting,
And in study wasting
    Youth that would be gay!        10

'Tis our spring that's slipping,
    Winter draweth near,
Life itself we're losing,
    And this sorry cheer
Dries the blood and chills the heart,        15
    Shrivels all delight.
Age and all its crowd of ills
    Terrifies our sight.
So short a day,
And life so quickly hasting,        20
And in study wasting
    Youth that would be gay!

Let us as the gods do,
    'Tis the wiser part:
Leisure and love's pleasure        25
    Seek the young in heart.
Follow the old fashion,
    Down into the street!
Down among the maidens,
    And the dancing feet!        30
So short a day,
And life so quickly hasting,
And in study wasting
    Youth that would be gay!

There for the seeing        35
    Is all loveliness,
White limbs moving
    Light in wantonness.
Gay go the dancers,
    I stand and see,        40
Gaze, till their glances
    Steal myself from me.
So short a day,
And life so quickly hasting,
And in study wasting        45
    Youth that would be gay!

13 cheer: "Disposition, frame of mind, mood" (Oxford English Dictionary, sense 3.a)

The Latin:

Omittamus studia,
dulce est desipere,
et carpamus dulcia
iuventutis tenere!
res est apta senectuti        5
seriis intendere,
<res est apta iuventuti
leta mente ludere.>
Velox etas preterit
studio detenta,        10
lascivire suggerit
tenera iuventa.

Ver etatis labitur,
hiems nostra properat
vita damnum patitur,        15
cura carnem macerat,
sanguis aret, hebet pectus,
minuuntur gaudia,
nos deterret iam senectus
morborum familia.        20
Velox etas preterit
studio detenta,
lascivire suggerit
tenera iuventa.

Imitemur superos!        25
digna est sententia,
et amoris teneros
iam venantur retia.
voto nostro serviamus!
mos iste est numinum.        30
ad plateas descendamus,
et choreas virginum!
Velox etas preterit
studio detenta,
lascivire suggerit        35
tenera iuventa.

Ibi, que fit facilis
est videndi copia,
ibi fulget mobilis
membrorum lascivia,        40
dum puelle se movendo
gestibus lasciviunt,
asto videns, et videndo
me michi subripiunt.
Velox etas preterit        45
studio detenta,
lascivire suggerit
tenera iuventa.

7-8 suppl. Herkenrath
28 retia Schumann: ocia cod.
30 numinum Patzig: minimum cod.: iuvenum Schmeller
43 asto Schmeller: consto cod.

I cobbled together the apparatus; I think it's accurate but can't be sure, because I don't have access to relevant books and periodicals.