Editing Week (section)

====Uses====
The [[semiconductor package#Date code|semiconductor package date code]] is often a 4 digit date code YYWW where the first two digits YY are the last 2 digits of the calendar year and the last two digits WW are the two-digit week number.<ref>{{cite web |publisher=Texas Instrument |url=http://focus.ti.com/quality/docs/gencontent.tsp?templateId=5909&navigationId=12626&contentId=153966 |title=Quality & Lead-free (Pb-free): Marking Convention |url-status=dead |archive-url=https://web.archive.org/web/20140405090712/http://focus.ti.com/quality/docs/gencontent.tsp?templateId=5909&navigationId=12626&contentId=153966 |archive-date=5 April 2014}}</ref><ref>{{cite web |publisher=Fairchild Semiconductor |url=http://www.fairchildsemi.com/support/packaging/topmark/dateCode4/ |title=Top Mark Convention – 4-Digit Date Code |url-status=dead |archive-url=https://web.archive.org/web/20140714111530/http://www.fairchildsemi.com/support/packaging/topmark/dateCode4/ |archive-date=14 July 2014}}</ref>

The [[tire code#DOT code|tire date code mandated by the US DOT]] is a 4 digit date code WWYY with two digits of the week number WW followed by the last two digits of the calendar year YY.<ref>{{cite web |url=https://www.law.cornell.edu/cfr/text/49/574.5 |title=49 CFR 574.5 – Tire identification requirements |website=Legal Information Institute}}</ref>