Pandas 如何查找同一财政年度的日期？

我的数据框看起来像这样

ECSDate DateOfTransfer  Amount
2011-12-04      2011-05-16 25000
2012-11-10      2011-05-16 3000
2013-02-19      2011-05-21 13750

我需要确定ECS和转账日期是否在从4月1日开始到3月31日结束的同一财政年度

If Month is Jan, Feb or march then:
2013-02-19 - 1 year = 2012-02-19 and 2012-04-01 is greater than 2011-05-21 so false

Else:
2012-11-10 start of year is 2012-04-01 and greater than 2011-05-16 so false

预期结果将是

True
False
False

---

编辑：

我试过的东西

这是一年前的日期：

mydf['NEW_DATE'] = mydf['ECSDate'].apply(lambda x: x - pd.DateOffset(years=1))

比较一下：

pd.to_datetime(mydf['NEW_DATE'].dt.year, 04, 01) < DateOfTransfer   

pd.Period('2011-12-04', freq='A-MAR') == pd.Period('2011-05-16', freq='A-MAR')

pd.Period('2012-11-10', freq='A-MAR') == pd.Period('2011-05-16', freq='A-MAR')

pd.Period('2013-02-19', freq='A-MAR') == pd.Period('2011-05-21', freq='A-MAR')

mydf[mydf['ECSDate'].dt.to_period(freq='A-MAR') == mydf['DateOfTransfer'].dt.to_period(freq='A-MAR')]