"2018-05-30 21:26:43",20.61129150,-100.40933971
"2018-05-30 21:26:43",20.61127415,-100.41146822
"2018-06-02 21:56:12",21.15633228,-100.93766080
"2018-06-05 22:57:40",20.59734201,-100.38091286
"2018-06-05 22:57:40",20.59875096,-100.37821426
"2018-06-06 20:56:22",20.61278120,-100.38446619
"2018-06-06 20:56:22",20.59865452,-100.37827264
"2018-06-06 21:57:15",20.59862012,-100.37817348
"2018-06-06 21:57:15",20.59864713,-100.37821263
"2018-06-06 21:57:15",20.59862915,-100.37825902
"2018-06-07 15:54:29",20.61280757,-100.39768857
"2018-06-07 15:54:29",20.61276216,-100.39769379

col_names = ['date', 'latitude', 'longitude']
df = pd.read_csv('marco.csv', names=col_names, sep=',', skiprows=1)

# merge
m = df.reset_index().merge(df.reset_index(), on='date')

2018-05-30, 2018-06-05, 2018-06-06, 2018-06-07