Meaning of the word "since the year one" in English

What does "since the year one" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

since the year one

US /sɪns ðə jɪr wʌn/
UK /sɪns ðə jɪr wʌn/
"since the year one" picture

Idiom

1.

for a very long time; since the earliest possible time

Example:
This tradition has been observed since the year one.
He's been complaining about that problem since the year one.
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