- This year, 5769, is the end of the 28 year cycle on which the vernal equinox falls out on a Wednesday. According to many, the blessing of oseh (ma'aseh) bereishis is made.
- Some argue there is no such cycle and the blessing was meant to be done every year on the summer solstice (tekufas tamuz).
- Others claim that the bracha was meant for when you see the sun after it was covered by clouds for three days.
- The Maharal MiPrag said that the bracha should be recited without shem u'malchus because it's unclear as to when it is meant to be said.
- The custom of saying it every 28 years seems to originate from the belief in the geocentric model which was introduced by Aristotle (the Rambam followed this theory and the Vilna Gaon opposed it)
- Many poskim did not make the bracha at all, especially the sefardim who lived among the Yishmaelim. (sha'arei teshuva)
- The Eitza is to recite the bracha next to the Yam (see beur halacha)
Follow this link to open a pdf file to help you learn more about it. Please post feedback. Yishar Koach.