[header] How to observe mercury [title] Consult astronomical calendars. [step] Mercury is the closest planet to the sun, which means that it is often in the sun's glare and hardly seen. However, there are specific times and seasons where the orbits of the earth and mercury place mercury high above the horizon line. 
What months and at what times of the day mercury is visible is entirely dependent on your location on earth, but most calendars will divide viewing months and times into hemispheres. [substeps] Mercury is best observed in the northern hemisphere during the evening in april and may, and during the morning in october and november.