Convert seconds from Epoch to timestamp to be used on 3D plot

[MissAuditore]

Hi,

My code:

Print Y 

fig = plt.figure(figsize = plt.figaspect(0.5)) 
ax = fig.add_subplot(1, 1, 1, projection='3d') 

surf = ax.plot_surface(X, Y, Z, rstride=1, cstride=1, cmap = cm.gist_rainbow, linewidth=0, antialiased=False) 

print Y 

ax.yaxis.set_major_formatter(matplotlib.dates.DateFormatter('%H:%M:%S\n%m/%d/%Y')) 
#ax.yaxis.set_major_locator(dates.MinuteLocator()) 

fig.colorbar(surf) 

plt.show() 

Result:

[[  1.34503975e+09   1.34503975e+09   1.34503975e+09 ...,   1.34503975e+09 
    1.34503975e+09   1.34503975e+09] 
 [  1.34503980e+09   1.34503980e+09   1.34503980e+09 ...,   1.34503980e+09 
    1.34503980e+09   1.34503980e+09] 
 [  1.34503986e+09   1.34503986e+09   1.34503986e+09 ...,   1.34503986e+09 
    1.34503986e+09   1.34503986e+09] 

Comes a error message up, when I try to do the set_major_locator. I just want to plot the dates on the yaxis as Date and Time and not seconds from Epoch.