Apparently, Date fields on zzSRDNewHirePersonData Remedy form have 'Date' type for storage - and that means they are in Julian Date format.
With Online Conversion - Julian Date Converter 2458812 gets converted to 2019-11-24
I am not sure, whether some 'date conversion' Action is out there available in workflow designer.
For anyone coming here in the future - there is no functionality to convert Date or Date/Time values to human readable in 19.08 or below
Perhaps in 19.11 - don't know yet
It is documented in the below space
Converts the epoch/UNIX timestamp to a formatted date.
Parameter type Parameter name Required Data type Description Input Epoch In Seconds Required Integer The epoch/UNIX timestamp. For example, 1572385070. Time Zone Optional String
The timezone of the output. If a value is not specified, the output will use the UTC time zone.
Datetime Format Optional String
The date and time format of the output. If a format is not specified, the M-dd-yy format is used (for example, November-22-19).
Output Output Not applicable String
The epoch timestamp in string format. For example, 1572385070 is converted to November-22-19.
Hope this helps.