ז תנו רבנן מלך שעמד בעשרים ותשעה באדר כיון שהגיע אחד בניסן עלתה לו שנה ואם לא עמד אלא באחד בניסן אין מונין לו שנה עד שיגיע ניסן אחר
7 as we have learnt: 'Bonds if antedated are invalid,<span class="x" onmousemove="('comment',' If a man borrowed money in Tishri and the bond was dated in Tammuz (the fourth month of the Jewish calendar) the bond is invalid and does not give the lender any right to seize property which the borrower may have sold even subsequent to Tishri. This is a fine for having conspired to seize by means of the bond property which had been sold prior to the making of the loan. Now if the reigning king came to the throne some time between Tammuz and Tishri, then if we reckoned his years from the date of his accession, Tishri would always come before Tammuz, and the document should therefore be valid. To prevent this leading to confusion, it was consequently ordained that the king's year should always be regarded as commencing with Nisan. Tosaf. point out that it is very difficult to conceive of an instance where this might actually lead to confusion, as scribes can usually be trusted to remember the year of the reign; the example Tosaf. give is where the king came to the throne on the first of Nisan and a scribe has to write a document on the first of Nisan in the following year. In such a case the scribe might easily think that the king came to the throne on the second of Nisan, and so, but for the regulation, might date the document a whole year wrong.');"><sup>16</sup></span> but if postdated are valid'. Our Rabbis learnt: If a king ascended the throne on the twenty-ninth of Adar, as soon as the first of Nisan arrives<span class="x" onmousemove="('comment',' I.e., on the next day.');"><sup>17</sup></span>