《辽史·本纪·卷四》
二月初一，建国号为大辽，大赦天下，改元大同。
二月丁巳朔，建国号大辽，大赦，改元大同。
On the first day of the second lunar month, the country name was erected as “Daliao” and a universal pardon was issued; the era was changed to “Datong”.