Pontianak, capital of the province of West Kalimantan lies exactly on the Equator. Twice a year, when the sun hovers right above the equator, you can watch yourself standing on your own shadow. This year the first equinox will occur on 21st to 23rd March 2017 precisely at 11.38 am West Indonesia Time, while the second will happen on 21-23 September.
At Equinox, the tilt of the Earth (with respect to the Sun) stands at 0°, and, for that reason, the duration of the day and the night will be almost exactly equal in length. In the northern hemisphere, the vernal equinox (March) conventionally marks the beginning of spring, celebrated by many cultures around the world, while the autumnal equinox (September) marks the beginning of autumn. Whereas, in the southern hemisphere, this is the exact opposite, where the vernal equinox is in September and the autumnal equinox in March.
With the sun being exactly overhead on these dates you will notice shadows of trees or people disappear for a few moments. Astronomers at the Equatorial Monument in Pontianak are even able to point out the exact second when the shadow of the city's iconic Monument and other objects around it will disappear from view.
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