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Advantages and disadvantages of thermoluminescence dating

If it is on a Sunday, it is part of week 52 of the previous year. If it is on a Thursday, it is in week 53 of the year just ending; if on a Friday it is in week 52 (or 53 if the year just ending is a leap year); if on a Saturday or Sunday, it is in week 52 of the year just ending.The long years, with 53 weeks in them, can be described by any of the following equivalent definitions: All other week-numbering years are short years and have 52 weeks.

This energy is lodged in the imperfect lattices of the mineral's crystals.

The first week of the year, hence, always contains 4 January.

ISO week year numbering therefore slightly deviates from the Gregorian for some days close to 1 January.

This was previously known as "Industrial date coding".

The system specifies a week year atop the Gregorian calendar by defining a notation for ordinal weeks of the year.

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