• 1 · Religion and Magic
• 2 · Nature
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• 2 · Nature
• 23 · time
• 23K · the twelve months represented by scenes showing human activities, usually in a landscape; so-called 'labours of the months'
• 23K2 · the months of the second quarter of the year ~ human activities (the 'labours' of April, May and June)

23K21 · April and its 'labours'

• 23K21(+1) · April and its 'labours' (+ with zodiacal signs)