Keywords: prior to, before then, until
Found 1 variant for this sign (click on video to enlarge):
1. Used immediately next to a verb to mean that the action began at some time in the past (or at a time which has already been mentioned) and continued up to the present (or another nominated time). English = from then to now, from then up to now; prior to and up to now, until now, until a specific point in time.