Generate Unicode Calendars for Markdown
The vast majority of email clients will render these correctly. Just make sure you select the typeface Courier New if you're using one of the monospace calendars. They render correctly on all devices I've tested. The bottom three calendars will render fine almost anywhere online. Social media sites will sometimes render of the enclosed alphanumeric characters as emoji. Luckily, that only applies to the calendar that you probably won't use anyway. The monospace calendars won't render properly on social media sites, except in code blocks on sites like Reddit.