Here’s a template that uses weekdays
{% set curhour = now().hour %}
{% if now().weekday() in (0,1,2,3,4) %}
{% if curhour <= 23 and curhour >= 13 %}
homeassistant.turn_on
{% else %}
homeassistant.turn_off
{% endif %}
{% else %}
{% if curhour <= 2 or curhour >= 13 %}
homeassistant.turn_on
{% else %}
homeassistant.turn_off
{% endif %}
{% endif %}