Several of the Calvinist princes and nobles, the Lutherans refusing to meet with them, united in a confederacy at Heilbrun, and drew up a long list of grievances, declaring that, until they were redressed, they should withhold the succors which the emperor had solicited to repel the Turks. Most of these grievances were very serious, sufficiently so to rouse men to almost any desperation of resistance. But it would be amusing, were it not humiliating, to find among them the complaint that the pope had changed the calendar from the Julian to the Gregorian. By the Julian calendar, or Old Style as it was called, the solar year was estimated at three hundred and sixty-five days and six hours; but it exceeds this by about eleven minutes. As no allowance was made for these minutes, which amount to a day in about one hundred and thirty years, the current year had, in process of ages, advanced ten days beyond the real time. Thus the vernal equinox, which really took place on the 10th of March, was assigned in the calendar to the 21st. To rectify this important error the New Style, or Gregorian calendar, was introduced, so called from Pope Gregory XII. Ten days were dropped after the 4th of October, 1582, and the 5th was called the 15th. This reform of the calendar, correct and necessary as it was, was for a long time adopted only by the Catholic princes, so hostile were the Protestants to any thing whatever which originated from the pope. In their list of grievances they mentioned this most salutary reform as one, stating that the pope and the Jesuits presumed even to change the order of times and years. This confederacy of the Calvinists, unaided by the Lutherans, accomplished nothing; but still, as year after year the disaffection increased, their numbers gradually increased also, until, on the 12th of February, 1603, at Heidelberg they entered into quite a formidable alliance, offensive and defensive. Rhodolph, encouraged by success, pressed his measure of intolerance with renovated vigor. Having quite effectually abolished the Protestant worship in the States of Austria, he turned his attention to Bohemia, where, under the mild government of his father, the Protestants had enjoyed a degree of liberty of conscience hardly known in any other part of Europe. The realm was startled by the promulgation of a decree forbidding both Calvinists and Lutherans from holding any meetings for divine worship, and declaring them incapacitated from holding any official employment whatever. At the same time he abolished all their schools, and either closed all their churches, or placed in them Catholic preachers. These same decrees were also promulgated and these same measures adopted in Hungary. And still the Protestants, insanely quarreling among themselves upon the most abstruse points of theological philosophy, chose rather to be devoured piecemeal by their great enemy than to combine in self-defense.