Kalenderwoche
Zwischen ISO-Woche und Datum umrechnen
Freitag, 27. März 2026
8:06:59PM
Aktuelle Woche des Jahres
13
23. März 2026 - 29. März 2026
Verbleibende Wochen dieses Jahres: 40
ISO-8601-Kalender
März 2026
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Mo
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Mi
Do
Fr
Sa
9
23
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27
28
1
10
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11
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13
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1
2
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23. März 2026 - 29. März 2026
Kalenderwoche: 13
Global Week Number & Planning Utility
Lernperspektiven
What is ISO-8601 Week Numbering?
While most people think of years in months, the global logistics and financial industries think in weeks. Standard ISO-8601 ensures that everyone from New York to Singapore is on 'Week 42' at the same time. This prevents massive errors in supply chain and project management.
Related Tools
Technical Insights
ISO-8601 week calculations determine week 1 as the week containing the year’s first Thursday.
Algorithms avoid locale quirks by operating on UTC-based anchor dates before mapping to local display.
Browse UI components are optimized to reduce re-renders when switching years and months.
Frequently Asked Questions
What is the ISO definition of week 1?
Week 1 is the week with the year’s first Thursday, ensuring consistent ISO-8601 numbering.
Can I convert a week number to dates?
Yes. Use the calculator to get start and end dates for any year/week.
How many weeks are in a year?
Most years have 52 weeks; some have 53 depending on how the weeks fall.
Is the calendar view interactive?
Yes. Browse months and see week numbers highlighted for quick reference.
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ExactTick Authority Engine
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