Julian Dates from Proleptic Gregorian and Julian Calendars

jdcal is a Python module designed for converting between Julian dates and calendar dates, supporting both proleptic Gregorian and Julian calendars. It enhances precision by storing Julian dates as a pair of floating-point numbers. The library provides functions for conversions in both directions (e.g., `gcal2jd` for Gregorian to Julian Date, and `jd2gcal` for the reverse). The current version is 1.4.1, with its last update in April 2019, suggesting a maintenance-focused release cadence.