Rare card
ISO week date
- Value
- 50 W
- Attack
- 291
- Defence
- 232
- Players
- 0
The ISO week date system is effectively a leap week calendar system that is part of the ISO 8601 date and time standard issued by the International Organization for Standardization (ISO) since 1988 (last revised in 2019) and, before that, it was defined in ISO (R) 2015 since 1971.
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