I think its the day before the war, where Zelensky went on media and talked about breaking the Budapest agreement and building nukes again. Russia might have intel before that Ukraine is planning to build a nuke, but didn't believe it at first because it might be false information to scare them into acting. But after that announcement, it pretty much confirmed the intel to Putin.
Their maps have consistently corresponded to reality. When ISW and Britain's MOD were showing in mid-to-late March large chunks of the southern theater north of Mariupol being controlled by the Ukrainians, the French were on it and identified all of that land as Russian-controlled territory, which is exactly what it was, based on numerous lines of evidence that the Russians had captured places like Tokmak, Novoukrainka, Volnovakha, Vuhledar, etc. It's been painfully obvious for two weeks that there would be no relief force coming to save Mariupol, and yet map after map from Western sources kept showing this magical corridor of Ukrainian control stretching from Donbas and Zaporizhizhia all the way to Mariupol. Same thing in Luhansk. LPR forces took the town of Starobilsk eons ago, along with the majority of Luhansk oblast, but you would never know it if you paid attention to ISW and the British, which for weeks showed only marginal levels of Russian control beyond the de facto pre-February borders. Again, the French MOD was spot on with the situation on the ground in Luhansk way before other Western sources. It's like the French are actually paying attention to the war, and the British are drinking tea and smoking hashish before their fingers crash all over the keyboard.
