in their history
Like the Greeks, they based their own alphabet on it.
The Hebrew alphabet: א ב ×’ ד ×” ו ×– ×— ט ×™ ×› ל מ × ×¡ ×¢ פ צ ק ר ש ת
They modified it, as did the Greeks and Romans.
From a combination of God and mathematically-gifted rabbis.
The ancient Phoenicians, followed by the Aramaians and Israelites.
Outside of the Jewish community, I am aware of no feasts that celebrate Israelites. Inside the Jewish community, there are 3. Pesach (Passover) in the spring celebrates the liberation of the Israelites from Egyptian bondage. Shavuot (Pentecost, the Feast of Weeks) celebrates the giving of the Torah to Moses and the Israelites at Mount Sinai. Succot (Booths) remembers the Israelites living in flimsy temporary booths during their desert wanderings. Each of these festivals has a secondary meaning as a harvest festival. All of these are part of the festival calendar laid out in the Torah.
The Mayan Calendar, Neurosurgery, and the most accurate Architecture ever built.
Yes, Hebrew on parchment. The Israelites always had a high level of literacy. The Ancient Israelites used a derivative of the Phoenician alphabet to transcribe Hebrew. Eventually, the Hebrew derivative of the Phoenician alphabet became particularized to Hebrew and became the forerunner of the Modern Hebrew alphabet.
Nisan, which is the month of spring (Exodus ch.16). In the Western calendar, the Exodus was in April.
We use the Latin alphabet, which was based on the Greek Alphabet, which was inspired by the Hebrew Alphabet.
The Mayans made both an alphabet and a Calendar so we could keep track of when the world is going to end or start. The Mayan calendar ends 2012. Some of us are generation X, some are Y. When Generation "Z" is over, the world will end. 2012.
The Greek alphabet was based on the Phoenician alphabet.