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Earnings Calendar Fiscal Quarter Ending
Why do stock markets allow these differences in reporting? The IRS allows businesses to use fiscal calendars that differ from the calendar year. There are a number of reasons a company would choose do this, from preferring to avoid an accounting rush at end of year during holiday season, to aligning with seasonality for their profits (some like to have Q4 as the strongest quarter). Smaller businesses may prefer to keep the extra stress of year end closeout to a traditionally slower time for the business, and some just start their fiscal calendar when the company starts up. You'll notice the report dates are a couple weeks after fiscal quarter end, you would read it as "three months ended...," so for Agilent, three months ended October 31, 2017, so August, September, October are their Q4 months.