Etymology From Middle English somtyme, som time, some tyme, sume time, sumtym, sumtyme, equivalent to some + time.
1
At an indefinite but stated time in the past or future.
I'll see you at the pub sometime this evening.
This will certainly happen sometime in the future.
2 more examples
It happened sometime yesterday.
But while there remains a considerable degree of consensus that the consequence of apparently losing the plot sometime between 1914 and 1918 was the cultural and economic malaise of the 1920s and 1930s, there are still some who look back on the interwar years less with criticism than with nostalgia.1995, John Frank Williams, The Quarantined Culture: Australian Reactions to Modernism, 1913–1939, page 219:
Obsolete At an unstated past or future time; once; formerly.
Did they not sometime cry "All hail" to me?1595 December 9 (first known performance), William Shakespeare, “The Life and Death of King Richard the Second”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act IV, scene i]:
Etymology From Middle English somtyme, som time, some tyme, sume time, sumtym, sumtyme, equivalent to some + time.
1
Former, erstwhile; at some previous time.
my sometime friend and mentor
Therefore our sometime sister, now our queen / Th' imperial jointress to this warlike statec. 1599–1602 (date written), William Shakespeare, “The Tragedie of Hamlet, Prince of Denmarke”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act I, scene ii]:
1 more example
Ion our sometime darling, whom we prized / As a stray gift, by bounteous Heaven dismiss'd1832, Thomas Noon Talfourd, Ion: A Tragedy, in Five Acts: