These graphics explain why Easter Sunday changes each year based on ancient interpretations of the solar and lunar cycles.

Cleostratus was a truly pioneering Greek astronomer who lived on the small Aegean island of Tenedos in the 6th century BC.

Sineng Electric has signed an agreement with Hassan Allam to supply 249 MW of central inverters to the Benban Solar Park, a landmark solar project with a total installed capacity of 1.65 GW. As one of ...

This Tuesday and Wednesday, four holidays from different cultures and religions overlap in a rare calendar year. The celebrations of Fat Tuesday (Mardi Gras) and Lunar New Year both occur on Tuesday, ...

Although the combined Valentine's Day and Presidents Day weekend has ended, there's a lot more to look forward to in the immediate future. Several holidays and observances across various faiths and ...

This Tuesday and Wednesday, four holidays from different cultures and religions overlap in a rare calendar year. The celebrations of Fat Tuesday (aka Mardi Gras) and Lunar New Year both occur on ...

Tesla Inc. isn’t waiting around to see if Elon Musk’s 100-gigawatt solar ambition is feasible — it’s already acting on it. The company is evaluating multiple sites across the US to begin manufacturing ...

The city is demanding about $20 million in penalties and restitution from Radiant Solar, the largest sum it has ever sought from a home improvement contractor. By Andy Newman Arthur Klein first ...

Our modern calendar is the Gregorian calendar, named for Pope Gregory XIII, who reformed it in 1582 to correct some errors in the older Julian calendar. The Julian calendar was named for Julius Caesar ...

Tesla has updated its online configurator with a new solar panel heavily emphasizing its US manufacturing at Gigafactory New York. It’s a surprising new product launch for a business that Tesla has ...