import pandas as pd
gifts = pd.read_csv("gifts.csv")
gifts["date"] = pd.to_datetime(gifts["date"])
print(gifts.head())

   id       date  amount
0   1 2015-10-16    75.0
1   1 2014-02-11   111.0
2   1 2012-03-28    93.0
3   1 2013-12-13   113.0
4   1 2012-01-10    93.0

start_target = datetime(year = 2018, month = 5, day = 1)
end_target = datetime(year = 2018, month = 8, day = 1)

gifts_target = gifts[(gifts["date"]>=start_target) & (gifts["date"]<end_target)]

gifts_pred_variables = gifts[(gifts["date"]<start_target]