WHD may refer to:

• World Health Day, a public health education day designated by the World Health Organization.
• World Humanitarian Day, a day designated by the United Nation.
• World Hypertension Day, a public health education day was initiated to increase the awareness of hypertension.

• Wafer Handling Diffusion, a machine used to load/unload solar wafers into/from a diffusion furnace.
• Wage and Hour Division, a division of the United States Department of Labor.
• Werdnig–Hoffmann disease, an infantile-onset type of spinal muscular atrophy.
• West Hampstead railway station, London, National Rail station code.
• WHD-TV, a defunct experimental digital television station.

This disambiguation page lists articles associated with the title WHD.
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