Linux puskom-ProLiant-DL385-Gen10 5.4.0-150-generic #167~18.04.1-Ubuntu SMP Wed May 24 00:51:42 UTC 2023 x86_64

//usr/share/glib-2.0/schemas/org.gnome.evolution-data-server.calendar.gschema.xml

 <?xml version="1.0" encoding="UTF-8"?>
<schemalist>

  <enum id='org.gnome.evolution-data-server.calendar.Duration'>
    <value value='0' nick='minutes'/>
    <value value='1' nick='hours'/>
    <value value='2' nick='days'/>
  </enum>

  <schema path="/org/gnome/evolution-data-server/calendar/" id="org.gnome.evolution-data-server.calendar" gettext-domain="evolution-data-server">

    <key type="b" name="contacts-reminder-enabled">
      <default>false</default>
      <summary>Birthday and anniversary reminder</summary>
      <description>Whether to set a reminder for birthdays and anniversaries</description>
    </key>
    <key type="i" name="contacts-reminder-interval">
      <default>15</default>
      <summary>Birthday and anniversary reminder value</summary>
      <description>Number of units for determining a birthday or anniversary reminder</description>
    </key>
    <key name="contacts-reminder-units" enum='org.gnome.evolution-data-server.calendar.Duration'>
      <default>'minutes'</default>
      <summary>Birthday and anniversary reminder units</summary>
      <description>Units for a birthday or anniversary reminder, “minutes”, “hours” or “days”</description>
    </key>
  </schema>

</schemalist>