Commentary for Rosh Hashanah 3:6

דתנן שטרי חוב המוקדמין פסולין והמאוחרין כשרין

<big><b>GEMARA: </b></big>FOR KINGS. Why this law?<span class="x" onmousemove="('comment',' Why should we not be content to reckon the year of the king from the day on which he ascended the throne?');">¹⁴</span> - R'Hisda said: For dealing with documents,<span class="x" onmousemove="('comment',' I.e., to enable us to determine which are antedated.');">¹⁵</span>

Rashi on Rosh Hashanah