Apparently, the 2025 Tolkien calendar (releasing in 2024) will be 'The History of Middle-earth' themed artwork:

There's no description, artist credit or cover image yet; though going by The History of Middle-earth theme, would it be safe to deduce that it will be by John Howe, as he did the book covers....?

US Release Date : 13 August 2024
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Tolkien Calendar 2025: The History of Middle-earth (US)

William Morrow Paperbacks (2024-08-13)


£Unknown Blackwell's (calendar) - Availability: Unknown
$16.99 Amazon.com (Calendar) - Availability: Preorderable
€18.43 Amazon.de (Kalender) - Availability: Preorderable