Calendar calc for PC

Calendar Calc is an application capable of performing calculations on various calendar elements, pregnancy, and fertility periods.

The application provides the following functions:
Days Between Dates: Calculates the inclusive interval between two dates, expressed in total days and in days, months, and years.
Holidays: Displays national holidays and non-working days within a selected month, according to the customs of your country. Currently supported national holidays include Portugal, Denmark, Brazil, Finland, United States of America, Iceland, United Kingdom, Norway, France, Netherlands, Germany, Sweden, Argentina, Mexico, Australia, South Africa, Canada, Saudi Arabia, New Zealand, Ireland, Slovenia, South Korea, China, Poland, Vietnam, Colombia, and Romania.
Add and Subtract Days: Calculates a new date by adding or subtracting days, months, and years from a selected date. It is also possible to compute only working days.
Next Working Day: Returns the next working day after a selected date.
Days Until Your Birthday: Indicates how many days are left until your birthday. It won't forget to wish you a happy birthday 😉
Weekday: Returns the corresponding day of the week (Monday, Tuesday, etc.) for a given date.
Person's Age: Calculates the age of a person based on their date of birth.
Leap Year: Checks whether a specified year is a leap year or not.
Estimated Due Date: Indicates the expected date of delivery based on the first day of the last menstrual period. It also provides the gestation period in weeks and days.
Fertility Days: Indicates the days when it is most likely to conceive, starting from the first day of the last menstrual period. The indicated days are highlighted with two different colors; lighter color indicates lower fertility, while darker color indicates higher fertility. It is important to remember that the provided dates should be taken as indicative and may vary in reality based on transient physiological conditions, medication intake, and existing medical conditions. Therefore, it is advisable to consult with your gynecologist for more precise instructions.
Settings: In the Settings, you can personalize the application theme (light or dark), date format, menstrual cycle duration, your date of birth, and working days within the week.