Timezone aware Timestamp.dayofyear does not report correct day

[tumalow-will]

Code Sample, a copy-pastable example if possible

import pandas as PD

time_str = '2015-10-01 23:59:00-04:00'
pd_dto = PD.to_datetime(time_str, utc=True).tz_convert('US/Eastern')

actual_yday = pd_dto.date().timetuple().tm_yday
print 'pandas thinks', pd_dto, 'is the', pd_dto.dayofyear, 'yday'
print 'when really its the', actual_yday

Expected Output

I expect the dayofyear to agree with tm_yday, but they do not.

output of pd.show_versions()

## INSTALLED VERSIONS

commit: None
python: 2.7.10.final.0
python-bits: 64
OS: Windows
OS-release: 8
machine: AMD64
processor: Intel64 Family 6 Model 61 Stepping 4, GenuineIntel
byteorder: little
LC_ALL: None
LANG: None

pandas: 0.16.2
nose: 1.3.7
Cython: 0.22.1
numpy: 1.9.2
scipy: 0.15.1
statsmodels: 0.6.1
IPython: 3.2.0
sphinx: 1.3.1
patsy: 0.3.0
dateutil: 2.4.2
pytz: 2015.4
bottleneck: 1.0.0
tables: 3.2.0
numexpr: 2.4.3
matplotlib: 1.4.3
openpyxl: 1.8.5
xlrd: 0.9.3
xlwt: 1.0.0
xlsxwriter: 0.7.3
lxml: 3.4.4
bs4: 4.3.2
html5lib: None
httplib2: None
apiclient: None
sqlalchemy: 1.0.5
pymysql: None
psycopg2: None

[jreback]

So this is working properly for DatetimeIndexes; which converts to 'local timestamps' before computing the field accessors. However for Timestamps it is NOT converting and doing this in UTC (which is what things are stored).

Pretty straightforward to fix if you'd like to do a PR. Relevant code is panda/tslib.pyx/Timestamp._get_field

In [37]: pd.to_datetime(['2015-1-01 23:59:00']).tz_localize('US/Eastern')
Out[37]: DatetimeIndex(['2015-01-01 23:59:00-05:00'], dtype='datetime64[ns, US/Eastern]', freq=None)

In [38]: pd.to_datetime(['2015-1-01 23:59:00']).tz_localize('US/Eastern').dayofyear
Out[38]: array([1], dtype=int32)

In [40]: pd.to_datetime(['2015-1-01 23:59:00']).tz_localize('US/Eastern').tz_convert('UTC')
Out[40]: DatetimeIndex(['2015-01-02 04:59:00+00:00'], dtype='datetime64[ns, UTC]', freq=None)

In [41]: pd.to_datetime(['2015-1-01 23:59:00']).tz_localize('US/Eastern').tz_convert('UTC').dayofyear
Out[41]: array([2], dtype=int32)

But not working for Timestamps

In [43]: ts
Out[43]: Timestamp('2015-01-01 23:59:00-0500', tz='US/Eastern')

In [44]: ts.dayofyear
Out[44]: 2