Why is Shavuot called the Feast of Oaths?

Why is Shavuot called the Feast of Oaths?

News Letter 5852-010 The Shemitah Year The 14th day of the 2nd month 5852 years after the creation of Adam The 2nd Month in the Seventh year of the Third Sabbatical Cycle The 3rd Sabbatical Cycle after the 119th Jubilee Cycle The Sabbatical Cycle of Earthquakes,...
Until when will they not attain purity?

Until when will they not attain purity?

News Letter 5852-003 The Shemitah Year 9th day of the 1st month 5852 years after the creation of Adam The 1st Month in the Seventh year of the Third Sabbatical Cycle The Third Sabbatical Cycle after the 119th Jubilee Cycle The Sabbatical Cycle of Earthquakes, Famines...