WASHINGTON, July 5 -- On the day Americans celebrated their nation's 250th birthday, Volodymyr Zelensky called Donald Trump to offer his congratulations - a gesture timed as much to the diplomatic calendar as to the holiday itself.

Axios journalist Barak Ravid reported the call on Saturday, citing an unnamed US official. "Zelensky spoke to President Trump on Saturday and congratulated him for the U.S. 250 independence day," Ravid wrote on X. No White House readout was issued, and no further detail on the conversation's substance was made available through official channels as of Saturday evening.

The call came on a day of significant battlefield movement. Russia's Defense Ministry announced a proposed six-hour ceasefire in Konstantinovk...