This module has the simple purpose of building html calendar tables with links and formatting. It is totally framework agnostic.

The module provides the htmlcalendar Python function that takes an starting date and a number of months for rendering the HTML Tables containing the specified months with formated cells and HTML links on day's numbers.

Formatting is provided by passing a callback function as the classes parameters that takes the date and returns a list of CSS classes that are applied to the date's cell.

Linking dates to URLs is also provided by a callback function passed as the links parameter that takes the date and returns a fully qualified HTML link if required or None if not.

For formatting the headers and the table you can use css classes in a list with the options th_classes and table_classes.

Attributes dictionary is added for allowing further customization of the calendar with the keyword attrs. Then, for ensuring safety on the building of the calendar the safe option is added to escape all the variables that are rendered building the calendar when it is disabled.

It also supports North American calendar with the option caltype putting its value to 1.

from flask import Flask
from datetime import date
from htmlcalendar import htmlcalendar

app = Flask("party")

def links(date):
        if date.weekday() == 5:
                return "https://github.com/llou/html-calendar"

def css_class(date):
        if date.weekday() == 5:
                return ["party"]

def attrs(date):
    return {"onclick": f"whatever({date.year}, {date.month}, {date.day})"}

@app.route("/")
def party_calendar():
        return htmlcalendar(date.today(), months=1, links=links, classes=css_class)

You can read the documentation at https://html-calendar.readthedocs.io/en/latest/