"pre_zone" : "-02:00" works fine, as does "02:00", but "+02:00" fails with a NumberFormatException:

Execution exception [[SearchPhaseExecutionException: Failed to execute phase [query_fetch], total failure; shardFailures {[vdmcVg94Qw-kgMeAy9Ibtg][u07qih0a27][0]: RemoteTransportException[[Abominable Snowman][inet[/10.29.147.216:9300]][search/phase/query+fetch]]; nested: SearchParseException[[u07qih0a27][0]: query[ConstantScore(NotDeleted(:))],from[0],size[10],sort[<custom:"timestamp": org.elasticsearch.index.field.data.longs.LongFieldDataType$1@1a91abc>!]: Parse Failure [Failed to parse source [{"from":0,"size":10,"query":{"match_all":{}},"sort":[{"timestamp":{"order":"desc"}}],"facets":{"test":{"date_histogram":{"key_field":"timestamp","value_field":"timestamp","interval":"month","pre_zone":"+02:00","pre_zone_adjust_large_interval":true}}}]]; nested: NumberFormatException[For input string: "+02"]; }]]