Was recently talking to a newly-hired pre-loader employee, and he told me that he completed his interview/tour/W-2 paperwork, etc. on May 6, 2019, and the Human Resources person said to him, "Expect an early-morning phone call from your Supervisor asking you to come into work -- within the next few days or so," and his very first day of work was actually June 20, 2019.
It took almost six weeks of him waking up & semi-getting-ready-for-work at around 3:00am-ish before he received his very first come-to-work phone call.
UPS makes the hiring process way more complicated than it needs to be, and potential and/or beginning employees get frustrated & burned out very quickly from all the confusing/vague/contradicting/half-truth information that they receive.