Modifications for the Date Price Calendar for WooCommerce WordPress plugin:

Disable weekends and holidays

This modification will add settings to disable weekends Saturday and Sunday and holidays.
The holidays should be specified in the following format: month day, month day ...
Example:
1 1, 1 18, 2 15
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download modified files and instructions : disable_weekends_and_holidays.zip
download the Date Price Calendar 1.0.0 plugin with all files modified: odp_1.0.0_with_weekends_and_holidays.zip

Disable ordered dates

It will save all ordered (out of stock) dates and will display them as disabled on the front-end product page.
It will make the date available again if the order is canceled or deleted.
You can adjust the number of orders per date to make it "out of stock" in the file:
wp-content/plugins/date-price-calendar/Model/Product/Order.php
on line 30:
  $stockLimit = 1;
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download modified files and instructions : disable_ordered_dates.zip
download the Date Price Calendar 1.0.0 plugin with all files modified: odp_1.0.0_with_disable_ordered_dates.zip

Calendar dependent on product option

This modification will make the popup calendar dependent on a product option.
After selecting the option only the specified days of the week will be available for selection in the calendar.
You can specify days of the week with special parameter "| days_of_week" in the option value title.
Example:
Class A | days_of_week 1,3
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download modified files and instructions : dependent_on_product_option.zip
download the Date Price Calendar 1.0.0 plugin with all files modified: odp_1.0.0_with_calendar_dependent_on_product_option.zip
download the Product Options 1.0.0 plugin with all files modified: pofw_1.0.0_with_calendar_dependent_on_product_option.zip

Product option dependent on calendar

This modification will make a product option dependent on the popup calendar.
After selecting the date only the specified option values for the selected day of the week will be available for selection.
You can specify days of the week with special parameter "| days_of_week " in the option value title.
Example:
10:00-10:30 | days_of_week 1,3
This modification works only with a radio button option.
But it is possible to edit the .js file to make it work for drop-down select options also.
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download modified files and instructions : product_option_dependent_on_calendar.zip
download the Date Price Calendar 1.0.0 plugin with all files modified: odp_1.0.0_with_product_option_dependent_on_calendar.zip
download the Product Options 1.0.0 plugin with all files modified: pofw_1.0.0_with_product_option_dependent_on_calendar.zip

Display upcoming dates

This modification will display upcoming dates below the text field option on the front-end product page as:
8 July - 18 July 10 euro
22 July - 26 July 20 euro
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download modified files and instructions : display_upcoming_dates.zip
download the Date Price Calendar 1.0.0 plugin with all files modified: odp_1.0.0_with_display_upcoming_dates.zip

Create default product option

Allow administrator to use the default option that will be created after saving the product.
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download modified files and instructions : create_default_option_for_calendar.zip
download the Date Price Calendar 1.0.0 plugin with all files modified: odp_1.0.0_with_create_default_option.zip

Multiple calendar options per product

One of the possible solutions to have multiple calendars per product is to rename this plugin and then install the renamed copy.
So that you will have two calendar options per product.
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download modified files and instructions : renamed_plugin_copy.zip
After downloading the .zip archive you should unzip it on your computer. It contains few renamed plugin versions.

Custom date format

If you need to add a new date format like d.m.y
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Instructions : custom_date_format.txt

Display prices in calendar

This modification will display prices inside the date cells of the popup calendar.
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download modified files and instructions : display_prices_in_calendar.zip
download the Date Price Calendar 1.0.0 plugin with all files modified: odp_1.0.0_with_prices_in_calendar.zip

Hijri calendar with Islamic dates

This modification will display Islamic dates of the Hijri calendar together with the Gregorian.
It uses code of jQuery UI datepicker with Hijri calendar:
https://github.com/othmanoss/datepicker-hijri

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download modified files and instructions : islamic_dates_Hijri_calendar.zip