**Visitors were welcome to continue their trips, with subdued dress and respectful behaviour.** For context, King Bhumibol died on **13 October 2016**; the advice below concerns the 2016–17 mourning period. The Tourism Authority of Thailand explicitly encouraged visitors to keep their travel plans. [Official visitor guidance](https://thaiembassy.cz/news-detail.php?id=14&item=781)

For a visit shortly after his death:

- **Wear modest, subdued clothing in public.** Black or white was a considerate choice, but tourists were explicitly exempt from any expectation to wear mourning colours. Packing a few plain, muted outfits would have been sensible.
- **Respect the solemn atmosphere.** Keep your voice low around ceremonies and mourners; avoid conspicuous partying or disruptive behaviour. Treat mourning gatherings as occasions for paying respects.
- **Check attractions and entertainment plans before travelling.** The Grand Palace and Temple of the Emerald Buddha were affected by funeral rites. Bars, clubs and festivals could close, cancel events or reduce celebrations.
- **Allow flexibility.** Ordinary transport and public services generally continued, although ceremonial areas could experience crowds and disruptions.

These points reflect the [Tourism Authority’s October 2016 recommendations](https://thaiembassy.cz/news-detail.php?id=14&item=781).

The durations in your question need a small correction: **government officials were instructed to wear mourning attire for one year; government flags were lowered for 30 days.** Those measures did not establish a year-long dress requirement for tourists. [Official royal-cremation media guide](https://tile.loc.gov/storage-services/service/gdc/gdcovop/2017343075/2017343075.pdf)

For a return visit during that year, the same approach applied: dress respectfully, follow instructions at ceremonial sites, and check local announcements. Around the cremation ceremonies on **25–29 October 2017**, additional closures and subdued entertainment returned. Even then, TAT reiterated that visitors were **not required to wear black**. [TAT’s October 2017 guidance](https://www.tatnews.org/2017/10/recommendations-regarding-royal-cremation-late-king-bhumibol-adulyadej/)