This value is valid, but too complex to be shown here. You can use the opening_hours evaluation tool to read it.
YoHours is a website to help OpenStreetMap contributors to add opening hours information on shops or amenities. In fact, OSM uses a complex syntax for this, and this can be long to write by hand everytime. That's why this tool allows you to create opening hours by simply draging the intervals where the feature is open on the calendar.
YoHours is now able to handle opening hours which depends of seasons. You can define hours for specific days, weeks, months or holidays. To do so, start by defining the common opening hours ("All year" tab), then refine by adding a new season (the green "+" tab) and set the opening hours on the new calendar. You can add as many seasons as you want. You can also edit or remove a season by clicking on the pencil and trash buttons, between seasons tabs and calendar.
If you need more help, or want more information about this project, you can contact me, check the code repository, or have a look at my personal website.