gala performance (noun) opening night: first performance
Sinonime: a single time, already, at one time, away back, back, back when, before, but once, bygone, earlier, erstwhile,
formerly, heretofore, in the old days, in the olden days, in times gone by, in times past,
late, long ago,
old, on one occasion, once only, once upon a time,
one, one time before, one time previously, only one time,
previously, quondam, sometime, this time, time was, whilom
Antonime: never