August 2024
The {{ Monthyear+1}} template takes no parameters and returns the name of the month and the year as they will be in another month, like this:
{{Monthyear+1}}
renders: August 2024Note that the same date can be shown for up to a week on a page since Wikipedia caches pages and only re-renders them under one of the follow circumstances:
{{#time:F Y|+1 month}}
See here to learn more about time parser functions.