---
layout: page
title: About
eyebrow: Python Web Calendaring Ecosystem
hero_sub: The boring important stuff.
---

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      <h2>What this is</h2>
      <p>
        Open source Python software covering the calendaring stack top to bottom: parsing .ics files,
        computing recurrences, talking to CalDAV and JMAP servers, CLI tools, Django integration.
        No company behind it. Maintainers use this in real projects.
      </p>

      <h2>Why it exists</h2>
      <p>
        Calendaring specs are old, full of gaps, and every real server interprets them differently.
        Most Python libraries in this space get recurrences wrong in ways that only show up in production,
        or just quietly skip the hard parts.
      </p>
      <p>
        We test against real servers, track compatibility per server, and fix what breaks.
      </p>

      <h2>Standards we implement</h2>
      <ul class="spec-list">
        {% for std in site.data.standards %}
        <li>{{ std.id }} — {{ std.name }}</li>
        {% endfor %}
      </ul>

      <h2>Funding</h2>
      <p>
        Funded by <a href="https://nlnet.nl" target="_blank" rel="noopener">NLnet</a> via the
        <a href="https://nlnet.nl/NGI0" target="_blank" rel="noopener">NGI Zero program</a>,
        backed by the European Commission's <a href="https://ngi.eu" target="_blank" rel="noopener">Next Generation
          Internet</a> initiative.
        Grants fund milestones and don't affect licensing or ownership.
      </p>
      <p>
        Two prior grants through NLnet NGI Zero Core funded this work:
        <a href="https://nlnet.nl/project/OpenWebCalendar/" target="_blank" rel="noopener">Open Web Calendar</a>
        and <a href="https://nlnet.nl/project/OpenWebCalendar-recurring/" target="_blank" rel="noopener">Open Web
          Calendar – recurring events</a>.
      </p>

      <h2>License and governance</h2>
      <p>
        All open source. Licenses vary by package: BSD, LGPL, GPL, AGPL, and Apache 2.0.
        No foundation, no formal structure. Each package is owned by its maintainers and contributors.
        Contributions welcome; see the <a href="/team">team page</a>.
      </p>

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        <p class="nlnet-label">Funded by</p>
        <p class="nlnet-name">NLnet Foundation, NGI Zero</p>
        <p class="nlnet-desc">This project has been funded by NLnet through the NGI Zero program, with financial
          support from the European Commission's Next Generation Internet initiative.</p>
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      <div class="nlnet-logos">
        <a href="https://nlnet.nl" target="_blank" rel="noopener">
          <img src="https://nlnet.nl/logo/banner.png" alt="NLnet foundation logo" height="40">
        </a>
        <a href="https://nlnet.nl/NGI0" target="_blank" rel="noopener">
          <img src="https://nlnet.nl/image/logos/NGI0_tag.svg" alt="NGI Zero Logo" height="40">
        </a>
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