Plot db data with timezones

plt_dates.py

fig, ax = plt.subplots()
fig.set_size_inches(8,6)
fmt = mdates.DateFormatter("%H:%M", tz=berlin)
ax.xaxis.set_major_formatter(fmt)
ax.plot_date([i.astimezone(berlin) for i in data["Date"]], data["Bz1"], "-", label="y1")

fig.autofmt_xdate()
#ax.set_xlim([dt.datetime(2015,8,7,17,0,0), dt.datetime(2015,8,7,19,0,0)])
#ax.set_ylim([-30,40])
plt.legend(loc='center right',
          bbox_to_anchor=(1.16,0.5))
plt.show()