Lenovo Date Record (Type 134)

Source: reverse engineered from the dumps of the data corpus.

Holds a date of a ThinkPad, which falls within the years the model has been made in, and so is probably its manufacture date, e.g. November 27, 2021 in lenovo/thinkpad-t14-g2a-20xk.bin. Structures of type 134 holding TPM information instead are told by their first string, TPM INFO.

Table 1. Lenovo Date Record structure
Offset	Version	Name	Length	Value	Description
`0x00`	2.0+	Type	`BYTE`	`134`	Lenovo Date Record indicator
`0x01`	2.0+	Length	`BYTE`	`0x0D`	Length of the structure
`0x02`	2.0+	Handle	`WORD`	Varies
`0x04`	2.0+	Day	`BYTE`	`BCD`
`0x05`	2.0+	Month	`BYTE`	`BCD`
`0x06`	2.0+	Year	`WORD`	`BCD`	Low byte first, e.g. `21 20` for 2021
`0x08`	2.0+	Reserved	5 BYTEs	`0`