Calendar ui leaves 1-day gap between consecutive calendars

Overview: Creating 2 consecutive calendars appears to leave a 1-day gap in calendar coverage, with the first calendar ending at midnight on the closing day and the subsequent calendar starting at midnight on the following day. This has been observed in both tamu's local Iris HF3 environment as well as https://folio-iris.dev.folio.org/. The examples are currently available in folio-iris as calendar entries for the Maps service point.
Steps to Reproduce:

1. Log into folio-iris and create a calendar that is Valid from: 12/10/2021 and Valid to 12/15/2021
2. Create a second calendar for the same service point that is Valid from 12/16/2021 and ** Valid to 1/17/2022**

Expected Results:

A get on the resulting calendars would show complete coverage between 12/15/2021 and 12/16/2021
Actual Results:

A get on the resulting calendars shows that the first calendar ends at midnight on 12/15/2021 and the second calendar starts at midnight on 12/16/2021, leaving a gap for the day of 12/16/2021
Additional Information:
URL:
Interested parties: cmalmbor