Date not pulling

[craigmediaservices]

Thank you, this is really cool.

date: invalid date ‘2024049 +0 days’
date: invalid date ‘2023049 +0 days’
date: invalid date ‘2023049 +40 days’
date: invalid date ‘2023049 +0 days’
date: invalid date ‘2024049 +0 days’
date: invalid date ‘2023049 +40 days’
date: invalid date ‘2023049 +0 days’
date: invalid date ‘2023049 +49 days’
date: invalid date ‘2023049 +0 days’
date: invalid date ‘2024049 +0 days’
date: invalid date ‘2023049 +49 days’
./source/main-script/paschal-full-moon.sh: line 625: cal: command not found

Installing "ncal" through apt launches the application - from the last error, but it still isn't able to figure out the correct date. Everything else appears to work though.