The Universal Screener assessment is used to identify readiness for on-grade level instruction. It is typically administered three times a year; though it may also be used on an ongoing basis as part of an MTSS model or with students supported by IEPs.
The screener testing windows (Fall, Winter, and Spring) are set at the district level. You can find your district's dates by navigating to the Progress Monitoring page, then hovering over the Calendar Icon in the top right corner.