| 摘要 |
A calendar indicating device can include easy placement through a north-south block (1) to orient an equinox line (3) to provide sunrise shadow indications of one or more solstice events such as the summer solstice or the winter solstice at the moment of sunrise. Designs can be based on remnants of artifacts that included some of the possible components, even for prehistoric man, in one integral stone device built from a stone base (2). Embodiments may include sunset indicator(s), solar altitude indicator(s), indicators for the maximum solar altitudes on the summer and/or winter solstice dates, and alignment aid(s).
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