SIGNS

Ka4-16:

During spring (where this glyph is located in a calendar for the year) sun is growing (up until midsummer). Growing is here expressed by a hand towards the mouth, because eating results in growing and sun is growing.

Ka4-16 is an example of a compound between one glyph type (GD15) and another (GD52):

GD15 GD52 Ka4-16

Eating normally is done while sitting down, not when standing up, but in spring sun is not 'setting' (as he does in autumn). Rather he is moving forward, which his legs also indicate.

To show his open mouth it is necessary to turn the head from front view to side view.