A Silesian buyer's morning is your afternoon. Put the dispatch notice there, not in their evening.
Katowice grew after coal was found in the eighteenth century, and its mines, steelworks and foundries shaped the Upper Silesian towns around it. Today the city sells itself on congresses, music and science as much as industry, but the buyers an Indian supplier deals with are often still at mills and plants in the metropolis.
Poland keeps Central European Time in winter and moves an hour ahead from the last Sunday in March to the last Sunday in October. A Katowice working day from 07:00 to 15:00 is 11:30 to 19:30 IST in winter and 10:30 to 18:30 in summer, so templates sent after Indian lunch land in the Silesian morning.
Templates for plant and purchasing staff go in Polish (pl); engineering and head-office threads are often in English (en). Each language version is approved separately. Replies inside the 24-hour window can be in any language your team writes.