5.1. Date and Time Types¶
5.1.1. Timestamp¶
subclass of
datetime.datetimeTimezone naive or aware
More information in Date and Time Timezones
import pandas as pd
pd.Timestamp('1961-04-12')
# Timestamp('1961-04-12 00:00:00')
pd.Timestamp('1961-04-12T06:07:00')
# Timestamp('1961-04-12 06:07:00')
pd.Timestamp('1961-04-12 6:07')
# Timestamp('1961-04-12 06:07:00')
import pandas as pd
pd.Timestamp('12/4/69')
# Timestamp('1969-12-04 00:00:00')
pd.Timestamp('12/4/69, 6:07')
# Timestamp('1969-12-04 06:07:00')
pd.Timestamp('12/4/69, 6:07 pm')
# Timestamp('1969-12-04 18:07:00')
2016-12-31 23:59:60 is a valid date (UTC leap second):
import pandas as pd
pd.Timestamp('2016-12-31 23:59:60')
# Traceback (most recent call last):
# ValueError: second must be in 0..59
5.1.2. Date Ranges¶
5.1.3. Period¶
More information in Date and Time Frequency
import pandas as pd
apollo11 = pd.Period('1969-07-16', '9D')
apollo11.start_time
# Timestamp('1969-07-16 00:00:00')
apollo11.end_time
# Timestamp('1969-07-24 23:59:59.999999999')
5.1.4. Days in a row¶
More information in Date and Time Frequency
import pandas as pd
pd.date_range('1970-01-01', periods=3, freq='D')
# DatetimeIndex(['1970-01-01', '1970-01-02', '1970-01-03'], dtype='datetime64[ns]', freq='D')
pd.date_range('1970-01-01', periods=3, freq='M')
# DatetimeIndex(['1970-01-31', '1970-02-28', '1970-03-31'], dtype='datetime64[ns]', freq='M')
pd.date_range('1970-01-01', periods=3, freq='Y')
# DatetimeIndex(['1970-12-31', '1971-12-31', '1972-12-31'], dtype='datetime64[ns]', freq='A-DEC')
5.1.5. Days between¶
from datetime import datetime
import pandas as pd
start = datetime(1969, 7, 16)
end = datetime(1969, 7, 21)
pd.date_range(start, end)
# DatetimeIndex(['1969-07-16', '1969-07-17', '1969-07-18',
# '1969-07-19', '1969-07-20', '1969-07-21'],
# dtype='datetime64[ns]', freq='D')
5.1.6. Attributes¶
More information in Date and Time Frequency
import pandas as pd
space_race = pd.date_range(start='1961-04-12', end='1969-07-21', freq='D')
space_race.freq
# <Day>
space_race.dtype
# dtype('<M8[ns]')
space_race.shape
# (3023,)
space_race.ndim
# 1
len(space_race)
# 3023
space_race.array
# <DatetimeArray>
# ['1961-04-12 00:00:00', '1961-04-13 00:00:00', '1961-04-14 00:00:00',
# '1961-04-15 00:00:00', '1961-04-16 00:00:00', '1961-04-17 00:00:00',
# '1961-04-18 00:00:00', '1961-04-19 00:00:00', '1961-04-20 00:00:00',
# '1961-04-21 00:00:00',
# ...
# '1969-07-12 00:00:00', '1969-07-13 00:00:00', '1969-07-14 00:00:00',
# '1969-07-15 00:00:00', '1969-07-16 00:00:00', '1969-07-17 00:00:00',
# '1969-07-18 00:00:00', '1969-07-19 00:00:00', '1969-07-20 00:00:00',
# '1969-07-21 00:00:00']
# Length: 3023, dtype: datetime64[ns]
space_race.values
# array(['1961-04-12T00:00:00.000000000', '1961-04-13T00:00:00.000000000',
# '1961-04-14T00:00:00.000000000', ...,
# '1969-07-19T00:00:00.000000000', '1969-07-20T00:00:00.000000000',
# '1969-07-21T00:00:00.000000000'], dtype='datetime64[ns]')