mikeage

KosherJava

This plugin allows WordPress to easily show Hebrew dates instead of (or in addition to) the standard Gregorian dates. No theme changes are required.
This plugin is based on the Hebrew Date plugin from KosherJava. All bugs are mine, though.
This plugin is slightly similar to https://wordpress.org/extend/plugins/wordpress-hebrew-date/, but much more robust. It’s also older, although not on wordpress.org
<h3>Known Issues</h3>
<ul>
<li>The sunset routine cannot take into account DST, since the wordpress offset is GMT +/-, not a timezone (not to mention the computational nightmare that is the Israeli timezone).</li>
</ul>

Hebrew Dates

This plugin allows WordPress to easily show Hebrew dates instead of (or in addition to) the standard Gregorian dates. No theme changes are required.

hatul

Redirect user out of your site on Shabbat and Holiday.
Read more on the <a href="https://wpshamor.com/" rel="nofollow ugc">official website</a>.

Shamor

Redirect user out of your site on Shabbat and Holiday.

Hebrew Dates vs Shamor