There are two reasons to forward your emails to a colleague rather than set your out of office. If you receive work email on your phone, it will distract you. Bypassing you completely will also avoid notifications on your phone and allow you to reduce the amount of catchup work on Festover Day next Monday.
Most modern PBX systems allow for advanced call routing. If you use RingCentral like us all you need to do is login at RingCentral and head to Call Handling and Forwarding. Turn off Apps and add a couple of colleagues to simul-ring to make sure someone answers your calls You can set up an advanced rule based on: Date and/or time of call, Caller ID, or the number called. These rules override your regular call-handling rules.
Marketing automation and integrations for Gmail that can schedule emails are a great resource for playing hookie from work. We use Hubspot's Apps for marketing and sales automation which also allows us to schedule our social media posts and outbound emails.