בַּחֹ֙דֶשׁ֙ הַשְּׁלִישִׁ֔י לְצֵ֥את בְּנֵי־יִשְׂרָאֵ֖ל מֵאֶ֣רֶץ מִצְרָ֑יִם בַּיּ֣וֹם הַזֶּ֔ה בָּ֖אוּ מִדְבַּ֥ר סִינָֽי׃
In the third month after the children of Israel were gone forth out of the land of Egypt, the same day came they into the wilderness of Sinai.
Read kabbalistic (mystical) interpretation of Exodus 19:1: and classical mystical sources.