Acer Z320 Service Manual page 99

 The week with the year's first Thursday in it (the formal ISO definition),
 The week with 4
 The first week with the majority (four or more) of its days in the starting year,
and
 The week starting with the Monday in the period 29 December – 4 January.
 If first January is on a Monday, Tuesday, Wednesday or Thursday, it is in
week 01. If first January is on a Friday, Saturday or Sunday, it is in week 52
or 53 of the previous year. 28
year.
— Sunday 1 January 1995 is identified by the calendar date
[1995-01-01] and week date [1994-W52-7]
— Tuesday 31 December 1996 is identified by the calendar date
[1996-31-12] and week date [1997-W01-2]
SSSSS: 5 unique hexadecimal codes, by manufacturer/factory/product base, start
form 00001 and reset every week.

Hexadecimal numeral system uses 16 digits, they are 0~9, A, B, C, D, E
and F.

Maintain one and only one counter to generate sequence numbers at a
manufacture site in different factory (Factory1/Factory2) and different
product (NB,/Tablet/SHH) that with a unique MM code.

First digit of SSSSS cannot be F, so the maximum value of SSSSS is Hex
(EFFFF) = 983039.
th
January in it,
th
December is always in the last week of its
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