Ukrainian parliament vote for removal of Yanukovych from office and call early elections

The transcript discusses the Ukrainian Spiritual Council's declaration of the nation's sovereign will, stating that President Viktor Yanukovych has unconstitutionally removed himself from power and is not fulfilling his duties. It announces early presidential elections for May 25, 2014, and concludes with a reference to Cossack brotherhood.

When were the extraordinary presidential elections scheduled to take place?

What is the significance of the phrase 'положить за нашу сватя козацького' in the context of the statement?