Hand-drawn Buddha symbol and buddha chronicle wordmark
Based on the sutras, the Vinaya and later commentaries
About the Sources

Ānanda attends the Buddha for twenty-five years

Attested across multiple schools

In the Shizhe jing (Discourse on the Attendant) of the Chinese Madhyama Āgama, himself says “I have attended the Buddha for twenty-five years”; when questions Ānanda on Mount Poluoluo in the country of , he uses the same words. If counted from Year 21 after the Awakening, twenty-five years reach exactly to the Buddha's passing, so these words would have been spoken in Year 45 after the Awakening or a little earlier. For how Ānanda came to be attendant, see the entry “Ānanda becomes the Buddha's permanent attendant”.

Different Accounts

The figure “twenty-five years of attendance” is found in the Theragāthā of the Southern tradition, the Chinese Dīrgha Āgama and Madhyama Āgama, and the Fo bannihuan jing; the Chinese Jiu za piyu jing has eight years.

Dating

Known only to fall between Years 21 and 45 after the Awakening (the Buddha aged fifty-five to eighty). “Twenty-five years” is stated in the texts, but the year from which it is counted is an estimate, so the time of the remark can only be placed at the end of this period.

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Research Notes: Reliability, Dating and Sources
How Reliability Is Assessed

Recorded in the sutras and Vinayas of several schools. Attested across multiple schools.

Dating Evidence and Precision

Converted from the Buddha's age (reckoned from the Buddha's age). Time precision: year uncertain.

Sources

Back to Events known only to fall within a span of years

Source text

日期怎麼讀

成道第幾年
從佛陀成道開始,每經過一次雨季安居算一年,每一年算到安居結束為止;所有年歲一律依二十九歲出家、三十五歲成道推算。
年份依據
區分經文自己明記、後世註解書記載、先後順序推定及年歲換算。
時間精確度
分別說明確定到日、月、年,或只能放入某幾年之間。
可信度
多派共傳、兩派記載、單派記載與後世補述,表達記載的共傳範圍;與時間及位置是否確定分開閱讀。