https://en.wikipedia.org/wiki/Afternoon

Afternoon is the time of day from noon or lunchtime until evening. There is no exact definition of ... The time period of evening is subjective, but it is often socially considered to start around 5pm or 6pm or shortly before sunset. During twilight ...

https://en.wikipedia.org/wiki/Evening

Evening is the period of time at the end of the day, usually from about 5 P.M. or 6 P.M. to night. It is a daily astronomic event of variable time period between daytime and night, and the period in which the daylight is decreasing, after the afternoon and ... considered to start around 5 P.M. or 6 P.M. and to last until night or bed-time.

https://forums.theknot.com/discussion/946955/should-i-say-5-oclock-in-the-evening-or-afternoon

May 4, 2011 ... I feel like I should say that my reception is at 5 o'clock in the evening, however I got corrected and was told that my insert for my reception should say 5 o'clock in the afternoon. ... As pps said, evening does not begin until 6 PM.

https://www.usingenglish.com/forum/threads/116309-5pm-good-afternoon-good-evening

Can one both use "good afternoon" and "good evening" at 5 pm ?

https://www.laruelouise.com/wording-etiquette/

Since the abbreviations “a.m.” and “p.m.” should not be used, the phrases “in the morning” or “in the evening” can ... Traditionally, times between 12 noon and 5:30 pm are considered the afternoon. 6:00 pm or later is considered the evening.

https://ell.stackexchange.com/questions/8954/the-exact-time-of-evening-and-night

Noon is at 12:00 PM. Afternoon is from 12:01 PM to around 5:00 PM. Evening is from 5:01 PM to 8 PM, or around sunset. Night is from sunset to ...

https://blog.jonudell.net/2009/06/15/when-does-afternoon-begin/

Jun 15, 2009 ... Morning: 5:00 AM to 11:30 AM Lunch: 11:30 AM to 1:00 PM Afternoon: 1:30 PM to 5:30 PM Evening: 5:30 PM to 9:00 PM Night: 9:00 PM to 5:00 ...

https://www.theamericanwedding.com/wedding-invitations-guide/commonmistakes/

12:01 p.m. – 5:59 p.m. is afternoon. 6:00 p.m.- 11:59 p.m. is evening. ... “ Reception immediately following ceremony at six o'clock in the evening” is incorrect.

https://www.quora.com/Which-hours-are-considered-evening-and-which-are-night

In my culture (United States), most places call it Afternoon up until 4:59 pm. Evening Begins at 5:00 pm. The difference between evening and ...

https://www.quora.com/What-are-afternoon-hours-and-evening-hours-Do-they-vary-based-on-business

Late afternoon lasts from 3 PM until 5 PM, when evening hours begin. ... Why is 3 am considered the “witching hour” or the "devil's hour"?