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Suggest using ISO 8601 for display of Period and PeriodIndex #1776
As of pandas 0.8.1, the Period and PeriodIndex display uses the English abbreviations for the month. Suggest that ISO 8601, would be a better choice.
Annual Period is fine...
I think that 'z' instead should be:
Hourly currently is
The ISO 8601 standard representation of hourly Periods would be: