《新唐书·本纪·卷六·肃宗 代宗》
十二日，代宗追尊生母为皇太后。
庚寅，追尊母为皇太后。
On the 12th, Emperor Daizong posthumously honored his biological mother as empress dowager.
<s>[INST] Translate the following Classical Chinese text into modern Chinese: 庚寅，追尊母为皇太后。 [/INST] 十二日，代宗追尊生母为皇太后。</s>
Translate the following Classical Chinese text into modern Chinese: 庚寅，追尊母为皇太后。
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十二日，代宗追尊生母为皇太后。
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